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(c) How much income would require paying a tax of €10,000?
€
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Explanation & Answer
10,000*0.1= 1000 euro
1000 or
1,000
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10 Multiple Choice 5 Short Answer
1.Given f '(x) = (x + 1)(6 + 3x), find the x-coordinate for the relative minimum on the graph of f(x). (5 points)0-1-2None ...
10 Multiple Choice 5 Short Answer
1.Given f '(x) = (x + 1)(6 + 3x), find the x-coordinate for the relative minimum on the graph of f(x). (5 points)0-1-2None of these2.Use the graph of f '(x) below to find the x values of the relative maximum on the graph of f(x): (5 points)0.5211.53.Given the position function s(t), s(t) = t3 + 4t, where s is measured in meters and t is in seconds, find the velocity and acceleration of the particle at t = 2 seconds. (5 points)8 m/sec; 4 m/sec210 m/sec; 3 m/sec216 m/sec; 16 m/sec216 m/sec; 12 m/sec24.Given the position function, , between t = 0 and t = 9, where s is given in feet and t is measured in seconds, find the interval in seconds where the particle is moving to the right. (5 points)3 < t < 95 < t < 9The particle never moves to the right.The particle always moves to the right.5.Given the relationship x3 + 2y2 =10, with y > 0 and = 4 units/min., find the value of at the instant y = 1 unit. (5 points) units/min units/min units/min units/min6.The base of a triangle is decreasing at the rate of 1 ft/sec, while the height is increasing at the rate of 2 ft/sec. At what rate is the area of the triangle changing when the base is 10 ft and the height is 70 ft? Remember to use the product rule when you find the expression for . (5 points)-25 ft2/sec-45 ft2/sec-50 ft2/sec45 ft2/sec7.Find . (5 points)108.Evaluate . (5 points)07-∞∞9.Which of the following statements is/are true? (5 points)I. If f '(x) exists and is nonzero for all x, then f(1) ≠ f(0). II. If f is differentiable for all x and f (-1) = f(1), then there is a number c, such that |c| < 1 and f '(c) = 0. III. If f '(c) = 0, then f has a local maximum or minimum at x = c.I onlyII onlyI and III onlyI and II only10.The local linear approximation of a function f will always be less than or equal to the function's value if, for all x in an interval containing the point of tangency, (5 points)f ' < 0f ' > 0f " < 0f " > 01.Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 6x(1/3) + 3x(4/3). You must justify your answer using an analysis of f '(x) and f "(x).2.What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and its derivative. Give one decimal place in your final answer.3.The position function of a particle in rectilinear motion is given by s(t) = t3 - 12t2 + 45t + 4 for t ≥ 0 with t measured in seconds and s(t) measured in feet. Find the position and acceleration of the particle at the instant when the particle reverses direction. Include units in your answer.4.A circle is growing so that the radius is increasing at the rate of 3 cm/min. How fast is the area of the circle changing at the instant the radius is 12 cm? Include units in your answer.5.The side of a square is measured to be 12 ft with a possible error of ±0.1 ft. Use linear approximation or differentials to estimate the error in the calculated area. Include units in your answer.
Would you buy term life insurance given the negative expected value
Maybe you have considered buying a term life insurance policy. The expected value Of any term life Insurance policy yields ...
Would you buy term life insurance given the negative expected value
Maybe you have considered buying a term life insurance policy. The expected value Of any term life Insurance policy yields a positive expected value for the insurance company and a negative expected value for you. Meaning the insurance company will make profits by selling their insurance products. Would you still buy term life insurance? Why as why not? Are there any other examples other than the insurance that use this same concept?
Boston University Prevail Physical Therapy & WiFi Network Research
With wifi and access points set up, Prevail Physical Therapy is open for business. Employees and clients arrive for their ...
Boston University Prevail Physical Therapy & WiFi Network Research
With wifi and access points set up, Prevail Physical Therapy is open for business. Employees and clients arrive for their first day at the new location and are eager to get to work. As is to be expected, however, there is some uncertainty among co-workers regarding how to use the new systems, as well as a few “bugs” that need to be worked out. You end up spending the entire day educating folks and resolving glitches.Kara, one of the physical therapists, emails you informing you that she can’t get on the network using her laptop. Click on the link below to read the email.First, research and list the troubleshooting steps you would take in this situation. During your troubleshooting you discover that the cafe is too far from the router. Determine how to resolve this issue and, using the Documentation Form, provide documentation for the resolution.
psych statistic wk 6
INSTRUCTIONS
Instructions
If the question requires computation, do the calculations and then give or select the correct v ...
psych statistic wk 6
INSTRUCTIONS
Instructions
If the question requires computation, do the calculations and then give or select the correct values using the following rule:
Keep at least 4 decimal places at intermediate steps of a calculation, and round your final answer to 2 decimal places, unless otherwise noted.
For example:
16.6667 would become 16.67 after rounding
Question 1
A survey of Ohio University students was conducted to determine if there was a particular Green that was desired by students to live on. A sample of students responses are reproduced below. Do students prefer a particular Green? Use critical value = 5.99.
Use the numbers below for this question only!
West Green South Green East Green
36 82 118
What would the expected value for the West Green be?
Question 2
A survey of Ohio University students was conducted to determine if there was a particular Green that was desired by students to live on. A sample of students responses are reproduced below. Do students prefer a particular Green? Use critical value = 5.99.
Use the numbers below for this question only!
West Green South Green East Green
27 50 77
What is the calculated chi-squared value?
Question 3
Using a critical value of 5.99, was there a significant preference for where students live based on the obtained chi-square value in Question 2?
Yes
No
Question 4
A local sports bar wanted to determine whether Ohio University students prefer a particular type of food in their establishment. A sample of students responses are reproduced below. Do students prefer a particular type of bar food? Use critical value = 6.58.
Use the numbers below for this question only!
Nachos Pizza Chicken Wings Cheese Sticks
38 29 48 33
What would the expected value for Cheese Sticks be?
Question 5
A local sports bar wanted to determine whether Ohio University students prefer a particular type of food in their establishment. A sample of students responses are reproduced below. Do students prefer a particular type of bar food? Use critical value = 6.58.
Use the numbers below for this question only!
Nachos Pizza Chicken Wings Cheese Sticks
42 37 42 42
What is the calculated chi-squared value?
Question 6
Using a critical value of 6.58, was there a significant preference for what students eat in a sports bar based on the obtained chi-square value in Question 5?
Yes
No
Question 7
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 285 242
Female 236 240
What would the expected value for the "male-yes" cell be?
Question 8
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 265 241
Female 225 295
What would the expected value for the "female-no" cell be?
Question 9
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests. Test for a relationship in the following data:
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 49 21
Female 25 47
What is the calculated chi-squared value?
Question 10
Using a critical value of 3.84, and based on the obtained chi-square value in Question 9, is there a significant relationship between gender and binge drinking?
Yes
No
Question 11
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 205 244
Female 248 211
What would the expected value for the "male-no" cell be?
Question 12
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 249 267
Female 286 282
What would the expected value for the "female-yes" cell be?
Question 13
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests. Test for a relationship in the following data:
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 35 23
Female 20 50
What is the calculated chi-squared value?
Question 14
Using a critical value of 3.84, and based on the obtained chi-square value in Question 13, is there a significant relationship between gender and alcohol-related arrests?
Yes
No
Question 15
Which of the following shows relationships between measurement variables?
Bar graph
Line graph
Pie chart
Pictogram
Scatterplot
Question 16
Papa Johns conducted a survey of 100 nursing students taking statistics to determine what toppings they preferred on their pizza. Data handlers converted students' responses into a pie (no pun intended) chart to display the results clearly to upper management. Did the data handlers do a good job in constructing a quality statistical picture? Examine the statistical picture below and if you see a feature that is problematic (e.g., inaccurate or misleading), place your cursor over that feature and click. If you change your mind, click on the clear button on the bottom left and you can begin again. If you decide the statistical picture contains no problematic features, click just above the word "cheese." (Hint: Check out the components of a well-designed statistical picture that are listed on page 7 of the Module 6 course notes, such as appropriate Title, correct Source, etc.)
If you are having problems getting your choice to register and save, then you are probably not using the Firefox browser. Switching to the Firefox browser should remedy the problem. If the problem persists, let your moderator know what your choice is BEFORE THE ASSIGNMENT DEADLINE!
Question 17
For which of the following scenarios would a line graph be most appropriate?
Eye color of babies
Percentage of men and women in occupational therapy positions
Number of patients admitted to a hospital each year from 1990 to 2010
Number of patients on each floor of the hospital yesterday
Question 18
Which of the following is not a true statement about bar graphs?
The horizontal axis does not need to be labeled for a bar graph.
Bar graphs show percentages or frequencies in various categories.
Bar graphs represent categorical data.
Pictograms are similar to bar graphs except they use pictures related to the topic.
Question 19
A chi-square test for independence is appropriate with
1 measurement variable
2 measurement variables
1 categorical variable
2 categorical variables
What proportion of patients has glucose levels exceeding 115?, biostatistics assignment help
1.
Glucose levels in patients free of diabetes are
assumed to follow a normal distribution with a mean of120 a ...
What proportion of patients has glucose levels exceeding 115?, biostatistics assignment help
1.
Glucose levels in patients free of diabetes are
assumed to follow a normal distribution with a mean of120 and a standard
deviation of 16. What proportion of patients has glucose levels exceeding 115?
2.
The mean total cholesterol level in women free
of cardiovascular disease is 205 with a standard deviation of 19.2. What
proportion of women has total serum cholesterol levels exceeding 200?
3.
The gestation period for human births can be
taken as normally distributed with a mean of 266 days and a standard deviation
of 16 days. If a gestation period of 276 days, what percentile among human
births is this?
4.
Suppose that the probability of a child living
in urban area in the US is obese is 20%. A social worker sees 15 children
living in urban areas. What is the probability that none are obese?
5.
Approximately 30% of obese patients develop
diabetes. If a physician sees 10 patients who are obese, what is the
probability that half of them will develop diabetes?
6.
The following data was collected in survey of 8th
graders and summarize their cell phone status.
No of cell phone
Conventional Cell phone user
Smart Phone user
Total
Boys
55
65
35
155
Girls
31
78
27
136
Total
86
143
62
291
What proportion of the 8th graders has
conventional cell phones?
7.
BMI in children is approximately normally
distributed within a mean 24.5 and standard deviation 6.2. A BMI between 25 and
30 is considered overweight. What proportion of children is overweight?
8.
The following table shows a distribution of BMI
in children living US and European urban neighborhoods. (The data is in
millions.)
Neighborhood
Normal weight
Overweight
Obese
Total
US
125
50
40
215
Europe
101
42
21
164
Total
226
92
61
379
If a child is selected at random,
a.
What is the probability they are overweight?
b.
What is the probability that a child living in
the US urban neighborhood is overweight?
9.
The risk of hepatoma among alcoholics without
cirrhosis of the liver is 24%. Suppose we observe 7 alcoholics without
cirrhosis. What is the probability that exactly 1 of these 7 people have
hepatoma?
10.
Screening test
Impaired Glucose Tolerance
Not Impaired
Positive
17
13
Negative
8
37
A new non-invasive screening test
is proposed that is claimed to be able to identify patients with impaired
glucose tolerance based on a battery of questions related to health behaviors.
The new test is given 75 patients. Based on each patient’s responses to the
questions they are classified as positive, or negative for impaired glucose
tolerance. Each patient also submits a blood sample and their glucose tolerance
status is determined. The results are tabulated below.
a.
What is the sensitivity of the screening test?
b.
What is the false positive fraction of the
screening test?
11. The
following table shows the results of a screening test hypothesized to detect
persons at risk of side effects of a cosmetic surgery.
Side Effects Positive
Side Effects Absent
Total
Screen Positive
12
6
18
Screen Negative
85
204
289
Total
97
210
307
a.
Compute the sensitivity of the test
b.
Compute the specificity of the test
c.
Compute the false positive fraction
d.
Compute the false negative fraction
12. The following table shows the results of the a
screening test hypothesized to identify persons at risk for rare blood disease
No Disease
Disease
Total
Screen Positive
1274
28
1302
Screen Negative
51
45
96
Total
1325
73
1398
a. Compute the sensitivity of the test
b. Compute the specificity of the test
c. Compute the false positive fraction
d. Compute the false negative fraction
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10 Multiple Choice 5 Short Answer
1.Given f '(x) = (x + 1)(6 + 3x), find the x-coordinate for the relative minimum on the graph of f(x). (5 points)0-1-2None ...
10 Multiple Choice 5 Short Answer
1.Given f '(x) = (x + 1)(6 + 3x), find the x-coordinate for the relative minimum on the graph of f(x). (5 points)0-1-2None of these2.Use the graph of f '(x) below to find the x values of the relative maximum on the graph of f(x): (5 points)0.5211.53.Given the position function s(t), s(t) = t3 + 4t, where s is measured in meters and t is in seconds, find the velocity and acceleration of the particle at t = 2 seconds. (5 points)8 m/sec; 4 m/sec210 m/sec; 3 m/sec216 m/sec; 16 m/sec216 m/sec; 12 m/sec24.Given the position function, , between t = 0 and t = 9, where s is given in feet and t is measured in seconds, find the interval in seconds where the particle is moving to the right. (5 points)3 < t < 95 < t < 9The particle never moves to the right.The particle always moves to the right.5.Given the relationship x3 + 2y2 =10, with y > 0 and = 4 units/min., find the value of at the instant y = 1 unit. (5 points) units/min units/min units/min units/min6.The base of a triangle is decreasing at the rate of 1 ft/sec, while the height is increasing at the rate of 2 ft/sec. At what rate is the area of the triangle changing when the base is 10 ft and the height is 70 ft? Remember to use the product rule when you find the expression for . (5 points)-25 ft2/sec-45 ft2/sec-50 ft2/sec45 ft2/sec7.Find . (5 points)108.Evaluate . (5 points)07-∞∞9.Which of the following statements is/are true? (5 points)I. If f '(x) exists and is nonzero for all x, then f(1) ≠ f(0). II. If f is differentiable for all x and f (-1) = f(1), then there is a number c, such that |c| < 1 and f '(c) = 0. III. If f '(c) = 0, then f has a local maximum or minimum at x = c.I onlyII onlyI and III onlyI and II only10.The local linear approximation of a function f will always be less than or equal to the function's value if, for all x in an interval containing the point of tangency, (5 points)f ' < 0f ' > 0f " < 0f " > 01.Find the x-coordinates of any relative extrema and inflection point(s) for the function f(x) = 6x(1/3) + 3x(4/3). You must justify your answer using an analysis of f '(x) and f "(x).2.What is the maximum volume in cubic inches of an open box to be made from a 16-inch by 30-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and its derivative. Give one decimal place in your final answer.3.The position function of a particle in rectilinear motion is given by s(t) = t3 - 12t2 + 45t + 4 for t ≥ 0 with t measured in seconds and s(t) measured in feet. Find the position and acceleration of the particle at the instant when the particle reverses direction. Include units in your answer.4.A circle is growing so that the radius is increasing at the rate of 3 cm/min. How fast is the area of the circle changing at the instant the radius is 12 cm? Include units in your answer.5.The side of a square is measured to be 12 ft with a possible error of ±0.1 ft. Use linear approximation or differentials to estimate the error in the calculated area. Include units in your answer.
Would you buy term life insurance given the negative expected value
Maybe you have considered buying a term life insurance policy. The expected value Of any term life Insurance policy yields ...
Would you buy term life insurance given the negative expected value
Maybe you have considered buying a term life insurance policy. The expected value Of any term life Insurance policy yields a positive expected value for the insurance company and a negative expected value for you. Meaning the insurance company will make profits by selling their insurance products. Would you still buy term life insurance? Why as why not? Are there any other examples other than the insurance that use this same concept?
Boston University Prevail Physical Therapy & WiFi Network Research
With wifi and access points set up, Prevail Physical Therapy is open for business. Employees and clients arrive for their ...
Boston University Prevail Physical Therapy & WiFi Network Research
With wifi and access points set up, Prevail Physical Therapy is open for business. Employees and clients arrive for their first day at the new location and are eager to get to work. As is to be expected, however, there is some uncertainty among co-workers regarding how to use the new systems, as well as a few “bugs” that need to be worked out. You end up spending the entire day educating folks and resolving glitches.Kara, one of the physical therapists, emails you informing you that she can’t get on the network using her laptop. Click on the link below to read the email.First, research and list the troubleshooting steps you would take in this situation. During your troubleshooting you discover that the cafe is too far from the router. Determine how to resolve this issue and, using the Documentation Form, provide documentation for the resolution.
psych statistic wk 6
INSTRUCTIONS
Instructions
If the question requires computation, do the calculations and then give or select the correct v ...
psych statistic wk 6
INSTRUCTIONS
Instructions
If the question requires computation, do the calculations and then give or select the correct values using the following rule:
Keep at least 4 decimal places at intermediate steps of a calculation, and round your final answer to 2 decimal places, unless otherwise noted.
For example:
16.6667 would become 16.67 after rounding
Question 1
A survey of Ohio University students was conducted to determine if there was a particular Green that was desired by students to live on. A sample of students responses are reproduced below. Do students prefer a particular Green? Use critical value = 5.99.
Use the numbers below for this question only!
West Green South Green East Green
36 82 118
What would the expected value for the West Green be?
Question 2
A survey of Ohio University students was conducted to determine if there was a particular Green that was desired by students to live on. A sample of students responses are reproduced below. Do students prefer a particular Green? Use critical value = 5.99.
Use the numbers below for this question only!
West Green South Green East Green
27 50 77
What is the calculated chi-squared value?
Question 3
Using a critical value of 5.99, was there a significant preference for where students live based on the obtained chi-square value in Question 2?
Yes
No
Question 4
A local sports bar wanted to determine whether Ohio University students prefer a particular type of food in their establishment. A sample of students responses are reproduced below. Do students prefer a particular type of bar food? Use critical value = 6.58.
Use the numbers below for this question only!
Nachos Pizza Chicken Wings Cheese Sticks
38 29 48 33
What would the expected value for Cheese Sticks be?
Question 5
A local sports bar wanted to determine whether Ohio University students prefer a particular type of food in their establishment. A sample of students responses are reproduced below. Do students prefer a particular type of bar food? Use critical value = 6.58.
Use the numbers below for this question only!
Nachos Pizza Chicken Wings Cheese Sticks
42 37 42 42
What is the calculated chi-squared value?
Question 6
Using a critical value of 6.58, was there a significant preference for what students eat in a sports bar based on the obtained chi-square value in Question 5?
Yes
No
Question 7
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 285 242
Female 236 240
What would the expected value for the "male-yes" cell be?
Question 8
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 265 241
Female 225 295
What would the expected value for the "female-no" cell be?
Question 9
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests. Test for a relationship in the following data:
Use the numbers below for this question only!
Binge Drinking?
YES NO
Male 49 21
Female 25 47
What is the calculated chi-squared value?
Question 10
Using a critical value of 3.84, and based on the obtained chi-square value in Question 9, is there a significant relationship between gender and binge drinking?
Yes
No
Question 11
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 205 244
Female 248 211
What would the expected value for the "male-no" cell be?
Question 12
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests.
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 249 267
Female 286 282
What would the expected value for the "female-yes" cell be?
Question 13
In a study of binge drinking among undergraduates at Ohio University, a researcher was interested in gender differences as related to binge drinking and to drinking-related arrests. She wanted to know two things: (a) Is there a significant relationship between gender and binge drinking (as defined by 5 or more drinks at one sitting), and (b) Is there a significant relationship between gender and drinking-related arrests? A random sample of males and females were asked about their experiences with binge drinking and with drinking-related arrests. Test for a relationship in the following data:
Use the numbers below for this question only!
Experience Alcohol-related Arrest?
YES NO
Male 35 23
Female 20 50
What is the calculated chi-squared value?
Question 14
Using a critical value of 3.84, and based on the obtained chi-square value in Question 13, is there a significant relationship between gender and alcohol-related arrests?
Yes
No
Question 15
Which of the following shows relationships between measurement variables?
Bar graph
Line graph
Pie chart
Pictogram
Scatterplot
Question 16
Papa Johns conducted a survey of 100 nursing students taking statistics to determine what toppings they preferred on their pizza. Data handlers converted students' responses into a pie (no pun intended) chart to display the results clearly to upper management. Did the data handlers do a good job in constructing a quality statistical picture? Examine the statistical picture below and if you see a feature that is problematic (e.g., inaccurate or misleading), place your cursor over that feature and click. If you change your mind, click on the clear button on the bottom left and you can begin again. If you decide the statistical picture contains no problematic features, click just above the word "cheese." (Hint: Check out the components of a well-designed statistical picture that are listed on page 7 of the Module 6 course notes, such as appropriate Title, correct Source, etc.)
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Question 17
For which of the following scenarios would a line graph be most appropriate?
Eye color of babies
Percentage of men and women in occupational therapy positions
Number of patients admitted to a hospital each year from 1990 to 2010
Number of patients on each floor of the hospital yesterday
Question 18
Which of the following is not a true statement about bar graphs?
The horizontal axis does not need to be labeled for a bar graph.
Bar graphs show percentages or frequencies in various categories.
Bar graphs represent categorical data.
Pictograms are similar to bar graphs except they use pictures related to the topic.
Question 19
A chi-square test for independence is appropriate with
1 measurement variable
2 measurement variables
1 categorical variable
2 categorical variables
What proportion of patients has glucose levels exceeding 115?, biostatistics assignment help
1.
Glucose levels in patients free of diabetes are
assumed to follow a normal distribution with a mean of120 a ...
What proportion of patients has glucose levels exceeding 115?, biostatistics assignment help
1.
Glucose levels in patients free of diabetes are
assumed to follow a normal distribution with a mean of120 and a standard
deviation of 16. What proportion of patients has glucose levels exceeding 115?
2.
The mean total cholesterol level in women free
of cardiovascular disease is 205 with a standard deviation of 19.2. What
proportion of women has total serum cholesterol levels exceeding 200?
3.
The gestation period for human births can be
taken as normally distributed with a mean of 266 days and a standard deviation
of 16 days. If a gestation period of 276 days, what percentile among human
births is this?
4.
Suppose that the probability of a child living
in urban area in the US is obese is 20%. A social worker sees 15 children
living in urban areas. What is the probability that none are obese?
5.
Approximately 30% of obese patients develop
diabetes. If a physician sees 10 patients who are obese, what is the
probability that half of them will develop diabetes?
6.
The following data was collected in survey of 8th
graders and summarize their cell phone status.
No of cell phone
Conventional Cell phone user
Smart Phone user
Total
Boys
55
65
35
155
Girls
31
78
27
136
Total
86
143
62
291
What proportion of the 8th graders has
conventional cell phones?
7.
BMI in children is approximately normally
distributed within a mean 24.5 and standard deviation 6.2. A BMI between 25 and
30 is considered overweight. What proportion of children is overweight?
8.
The following table shows a distribution of BMI
in children living US and European urban neighborhoods. (The data is in
millions.)
Neighborhood
Normal weight
Overweight
Obese
Total
US
125
50
40
215
Europe
101
42
21
164
Total
226
92
61
379
If a child is selected at random,
a.
What is the probability they are overweight?
b.
What is the probability that a child living in
the US urban neighborhood is overweight?
9.
The risk of hepatoma among alcoholics without
cirrhosis of the liver is 24%. Suppose we observe 7 alcoholics without
cirrhosis. What is the probability that exactly 1 of these 7 people have
hepatoma?
10.
Screening test
Impaired Glucose Tolerance
Not Impaired
Positive
17
13
Negative
8
37
A new non-invasive screening test
is proposed that is claimed to be able to identify patients with impaired
glucose tolerance based on a battery of questions related to health behaviors.
The new test is given 75 patients. Based on each patient’s responses to the
questions they are classified as positive, or negative for impaired glucose
tolerance. Each patient also submits a blood sample and their glucose tolerance
status is determined. The results are tabulated below.
a.
What is the sensitivity of the screening test?
b.
What is the false positive fraction of the
screening test?
11. The
following table shows the results of a screening test hypothesized to detect
persons at risk of side effects of a cosmetic surgery.
Side Effects Positive
Side Effects Absent
Total
Screen Positive
12
6
18
Screen Negative
85
204
289
Total
97
210
307
a.
Compute the sensitivity of the test
b.
Compute the specificity of the test
c.
Compute the false positive fraction
d.
Compute the false negative fraction
12. The following table shows the results of the a
screening test hypothesized to identify persons at risk for rare blood disease
No Disease
Disease
Total
Screen Positive
1274
28
1302
Screen Negative
51
45
96
Total
1325
73
1398
a. Compute the sensitivity of the test
b. Compute the specificity of the test
c. Compute the false positive fraction
d. Compute the false negative fraction
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