Description
Unformatted Attachment Preview
(10 points)
(#6.3.5a, page 191)
Six healthy 3-year-old female Suffolk sheep were injected with the antibiotic Gentamicin,
at a dosage of 10 mg/kg body weight. Their blood serum concentrations (ug/ml) of
Gentamicin 1.5 hours after injection were as follows:
33
26
34
31 23
25
For these data the sample mean is 28.7 (ug/ml), the standard deviation is 4.6 (ug/ml), and
the standard error of the sample mean is 1.9 (ug/ml).
Construct a 95% confidence interval for the population mean.
(10 points)
(# 6.2.2, page 182)
An agronomist measured the heights of n corn plants. The mean height was 220 cm and
the standard deviation was 15 cm. Calculate the standard error of the mean if
n=25
n = 100
a.
b.
(#6.2.3, page 182)
In evaluating a forage crop, it is important to measure the concentration of various
constituents in the plant tissue. In a study of the reliability of such measurements, a batch
of alfalfa was dried, ground, and passed through a fine screen. Five small (0.3 gm)
aliquots of the alfalfa were then analyzed for their content of insoluble ash. The results
(gm/kg) were as follows:
10.0 8.9
9.1
11.7 7.9
The sample mean and standard deviation of this data set are 9.520 (gm/kg) and 1.429
(gm/kg), respectively. Calculate the standard error of the mean for this data set.
Round your answer to 2 decimal places.
Purchase answer to see full attachment
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.
Explanation & Answer
Review
Review
Anonymous
Super useful! Studypool never disappoints.
Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4
24/7 Homework Help
Stuck on a homework question? Our verified tutors can answer all questions, from basic math to advanced rocket science!
Most Popular Content
HU Statistics Questions
Question 1A sample of nurses with
affiliation to private hospitals (affiliation = 0) and to university
hospitals (affi ...
HU Statistics Questions
Question 1A sample of nurses with
affiliation to private hospitals (affiliation = 0) and to university
hospitals (affiliation = 1) was asked to rate their confidence in making
the right decisions based on their level of ongoing inservice
professional development. Use a Mann-Whitney U-test to determine if the
distribution of confidence in each group is the same. The file is the
first tab in “nonparametric.xlsx.” Be sure to always write the
null and alternate hypotheses, so that the decision is made in the
correct direction. Also, conduct all as two-tailed tests at α = 0.05.Question 2In
the previous item, we used the Mann-Whitney test rather than an
independent t-test. Why might we Mann-Whitney rather than the t-test?Question 3
In the third tab of the same file (nonparametric_sheets.xslx), there
are data for the selling prices of homes in a ZIP code and the square
footage of those homes. Use the Spearman rank correlation to determine
if there is a significant correlation between the home price and the
square footage.A table of Spearman rank significance values is located in the file. Question 4Why
did we not just use the Pearson correlation for the previous item? That
is, what is the Pearson correlation influenced by that the Spearman is
not?Question 5A restaurant wondered if
there was a difference in the number of refills of soda ordered by those
aged 18-24 (age = 0) and those aged 13-17 (age = 1). Use the
Mann-Whitney U-test to determine if the distribution of soda refills is
significantly different for the two groups.Question 6An
organization was attempting to determine whether there was congruence
between the rating of their hiring personnel in rating new employees
during their interview presentations. The file “Spearman 2” to determine
the Spearman rank correlation between the judges’ ratings.Question 7The following data were collected related to the number of visits to a suburban health clinic. Month Visits January 1610 February 1585 March 1649 April 1590 May 1540 June 1397 July 1410 August 1350 September 1495 October 1564 November 1602 December 1655 The
null hypothesis is that the number of visits is uniformly distributed
throughout the year. Use a chi-square goodness-of-fit test to determine
whether the null hypothesis should be rejected at α = 0.05. Interpret
the results.Question 8There are 8 job
codes in a large hospital system. The table below indicates the number
of grievances filed by members of the union by job code. Are the number
of grievances uniformly distributed at α = 0.05? Job Code Grievances 1 19 2 17 3 14 4 18 5 19 6 21 7 18 8 18 Interpret this for hospital leadership.Question 9A
research firm was interested in knowing whether income level and
location of service for procedures were independent. The following data
were provided. Clinic Hospital Private <$30,000 85 16 6 $30,000 to $49,999 102 27 13 $50,000 to $99,999 36 22 15 > $99,999 15 23 25 Use
a chi-square test of independence to determine whether income level and
service location are independent. Test the null hypothesis the service
location is independent of income at α = 0.01.Question 10Is
the preferred beverage ordered at lunch independent of the age bracket
in a hospital cafeteria? Test the null that is independent at α = 0.05. Coffee/Tea Soft Drink Other 21-34 26 95 18 35-55 41 40 20 >55 24 13 32
13 pages
Stat 200 Week 6 Solutions
Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biol ...
Stat 200 Week 6 Solutions
Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biology exam 84,199 of them were ...
Cox Proportional Hazard and the effects of weights, statistics homework help
Week 9 assignment Part one: Cox Proportional HazardDataset Access the dataset in this week’s Learning Resou ...
Cox Proportional Hazard and the effects of weights, statistics homework help
Week 9 assignment Part one: Cox Proportional HazardDataset Access the dataset in this week’s Learning Resources. Identify the censoring variable, given that you wish to evaluate the event stroke. Identify the time-to-event variable and produce a frequency table to determine the presence of ties. Identify the independent variable for exposure status, given the following research question: Is there an association between hypertension and the time a person was followed before experiencing a stroke? Create a table with the above variables and their role in this analysis. Test the assumption of proportionality Use Kaplan-Meier in SPSS. Create a Hazard plot with time = followed, status=stroke, and factor = hypertension. Interpret the results: Are the baseline hazards proportional and what does this mean in terms of your planned methodology? Use SPSS to run a Cox Proportional Hazards test Use stroke as the event and hypertension as the factor. (be sure to identify hypertension as a categorical variable). Be sure to include the output in your submission. Create a Hazard Plot for Hypertension (select separate lines) Interpret the results. Could the presence of ties in time followed (from the frequency table in 1c) affect the results? How might you accommodate ties in this analysis? Part two: The Effect of Weights Examine the Data Open the Week 10 Dataset (SPSS document) located in the Learning Resources area. Produce numeric descriptive statistics for the following variables: Cregion USR Sex Q1 Q6a Q16 Q22a Receduc Race/Ethnicity Logistic Regression Use SPSS to run a logistic regression model with Q22a. “Have you ever looked online for -- Information about a specific disease or medical problem?” as your dependent variable (Note that there are 4 levels of responses possible, but only 2 are actually used in the responses so you can state the dependent variable is a binomial and use binary logistic regression) and Sex as the independent variable. Use backwards stepwise regression to add Receduc to the model as a potential confounder. How does the relationship between Q22a and Sex change with the addition of Receduc? Include a discussion of Odds Ratios and the Model Summary in your answer. Would you consider Receduc a confounder? Is it worth keeping it in the model even if it does not coufound the relationship between Q22a and Sex in this sample? Logistic Regression with weights Weight cases using the variable standwt (Standardized weight) Use SPSS to rerun a logistic regression model with Q22a. “Have you ever looked online for -- Information about a specific disease or medical problem?” as your dependent variable, Sex as the independent variable, and Receduc as a covariate. How does weighting the cases change the outcome of the logistic regression? Discuss why it is important to weight cases from surveys with complex sampling schemes using the differing outcomes you have from parts 2 and 3 of this assignment.
5 pages
Order 27450741 Exploring Relationships Between Two Variables
Crimes may be classified as either property crime or violent crimes. That has been speculation that hard criminals are eng ...
Order 27450741 Exploring Relationships Between Two Variables
Crimes may be classified as either property crime or violent crimes. That has been speculation that hard criminals are engaged in violent crimes while ...
MAT 154 Grand Canyon University Modeling a Problem Statistics Project
: Consider one way of modeling a problem. Say you have a device an in any given year there is about a 1 in 6 chance that t ...
MAT 154 Grand Canyon University Modeling a Problem Statistics Project
: Consider one way of modeling a problem. Say you have a device an in any given year there is about a 1 in 6 chance that the device will fail. A question is, “On average, how long will it be before such a device fails?” This sort of problem is what will be modeled and analyzed here.
Similar Content
Poor product or service quality, assignment help
1)
Describe three recent situations in which you were
directly affected by poor product or service quality. What might h...
Systems of Linear Equations Augmented Matrix Methods Questions
I need the following 2 questions answer asap. The questions are attached below. Thanks. Let me know if you have any questi...
college algebra math 107 one question only
use the given complex numbers z and w to find and simplify the following. • z + w • zw • z2 • 1
z • z
w • w ...
what is the answer in simplest form for 19 over 14 x 7 over 6
ok my math is giberish too me so i have no idea what im doin most of the time and need help on it.like desperate help,i al...
Interest Rate Rate of Return and equivalence
Q1) An employee borrows $10,000 and must repay a total of $10,700 exactly 1 year later. Determine the interest amount and ...
Need help with algebra problem
jose has $2.45 in nickels and dimes. He has 10 more nickels than dimes. how many of each does he have?...
2 Statistical Exercises
A computer scanner can read a bar code on a package correctly 97% of the time. One company monitors the accuracy of the sc...
Age In Years Solution
My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my ...
Camscanner 07 06 2021 11.09
...
Related Tags
Book Guides
I Cant Make This Up - Life Lessons
by Kevin Hart
The Knife of Never Letting Go
by Patrick Ness
The Eyes Were Watching God
by Zora Neale Hurston
Jane Eyre
by Charlotte Brontë
A Passage to India
by E. M. Forster
Pride and Prejudice
by Jane Austen
The Mayor of Casterbridge
by Thomas Hardy
The Power of Habit - Why We Do What We Do in Life and Business
by Charles Duhigg
Alice in Wonderland
by Lewis Carroll
Get 24/7
Homework help
Our tutors provide high quality explanations & answers.
Post question
Most Popular Content
HU Statistics Questions
Question 1A sample of nurses with
affiliation to private hospitals (affiliation = 0) and to university
hospitals (affi ...
HU Statistics Questions
Question 1A sample of nurses with
affiliation to private hospitals (affiliation = 0) and to university
hospitals (affiliation = 1) was asked to rate their confidence in making
the right decisions based on their level of ongoing inservice
professional development. Use a Mann-Whitney U-test to determine if the
distribution of confidence in each group is the same. The file is the
first tab in “nonparametric.xlsx.” Be sure to always write the
null and alternate hypotheses, so that the decision is made in the
correct direction. Also, conduct all as two-tailed tests at α = 0.05.Question 2In
the previous item, we used the Mann-Whitney test rather than an
independent t-test. Why might we Mann-Whitney rather than the t-test?Question 3
In the third tab of the same file (nonparametric_sheets.xslx), there
are data for the selling prices of homes in a ZIP code and the square
footage of those homes. Use the Spearman rank correlation to determine
if there is a significant correlation between the home price and the
square footage.A table of Spearman rank significance values is located in the file. Question 4Why
did we not just use the Pearson correlation for the previous item? That
is, what is the Pearson correlation influenced by that the Spearman is
not?Question 5A restaurant wondered if
there was a difference in the number of refills of soda ordered by those
aged 18-24 (age = 0) and those aged 13-17 (age = 1). Use the
Mann-Whitney U-test to determine if the distribution of soda refills is
significantly different for the two groups.Question 6An
organization was attempting to determine whether there was congruence
between the rating of their hiring personnel in rating new employees
during their interview presentations. The file “Spearman 2” to determine
the Spearman rank correlation between the judges’ ratings.Question 7The following data were collected related to the number of visits to a suburban health clinic. Month Visits January 1610 February 1585 March 1649 April 1590 May 1540 June 1397 July 1410 August 1350 September 1495 October 1564 November 1602 December 1655 The
null hypothesis is that the number of visits is uniformly distributed
throughout the year. Use a chi-square goodness-of-fit test to determine
whether the null hypothesis should be rejected at α = 0.05. Interpret
the results.Question 8There are 8 job
codes in a large hospital system. The table below indicates the number
of grievances filed by members of the union by job code. Are the number
of grievances uniformly distributed at α = 0.05? Job Code Grievances 1 19 2 17 3 14 4 18 5 19 6 21 7 18 8 18 Interpret this for hospital leadership.Question 9A
research firm was interested in knowing whether income level and
location of service for procedures were independent. The following data
were provided. Clinic Hospital Private <$30,000 85 16 6 $30,000 to $49,999 102 27 13 $50,000 to $99,999 36 22 15 > $99,999 15 23 25 Use
a chi-square test of independence to determine whether income level and
service location are independent. Test the null hypothesis the service
location is independent of income at α = 0.01.Question 10Is
the preferred beverage ordered at lunch independent of the age bracket
in a hospital cafeteria? Test the null that is independent at α = 0.05. Coffee/Tea Soft Drink Other 21-34 26 95 18 35-55 41 40 20 >55 24 13 32
13 pages
Stat 200 Week 6 Solutions
Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biol ...
Stat 200 Week 6 Solutions
Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biology exam 84,199 of them were ...
Cox Proportional Hazard and the effects of weights, statistics homework help
Week 9 assignment Part one: Cox Proportional HazardDataset Access the dataset in this week’s Learning Resou ...
Cox Proportional Hazard and the effects of weights, statistics homework help
Week 9 assignment Part one: Cox Proportional HazardDataset Access the dataset in this week’s Learning Resources. Identify the censoring variable, given that you wish to evaluate the event stroke. Identify the time-to-event variable and produce a frequency table to determine the presence of ties. Identify the independent variable for exposure status, given the following research question: Is there an association between hypertension and the time a person was followed before experiencing a stroke? Create a table with the above variables and their role in this analysis. Test the assumption of proportionality Use Kaplan-Meier in SPSS. Create a Hazard plot with time = followed, status=stroke, and factor = hypertension. Interpret the results: Are the baseline hazards proportional and what does this mean in terms of your planned methodology? Use SPSS to run a Cox Proportional Hazards test Use stroke as the event and hypertension as the factor. (be sure to identify hypertension as a categorical variable). Be sure to include the output in your submission. Create a Hazard Plot for Hypertension (select separate lines) Interpret the results. Could the presence of ties in time followed (from the frequency table in 1c) affect the results? How might you accommodate ties in this analysis? Part two: The Effect of Weights Examine the Data Open the Week 10 Dataset (SPSS document) located in the Learning Resources area. Produce numeric descriptive statistics for the following variables: Cregion USR Sex Q1 Q6a Q16 Q22a Receduc Race/Ethnicity Logistic Regression Use SPSS to run a logistic regression model with Q22a. “Have you ever looked online for -- Information about a specific disease or medical problem?” as your dependent variable (Note that there are 4 levels of responses possible, but only 2 are actually used in the responses so you can state the dependent variable is a binomial and use binary logistic regression) and Sex as the independent variable. Use backwards stepwise regression to add Receduc to the model as a potential confounder. How does the relationship between Q22a and Sex change with the addition of Receduc? Include a discussion of Odds Ratios and the Model Summary in your answer. Would you consider Receduc a confounder? Is it worth keeping it in the model even if it does not coufound the relationship between Q22a and Sex in this sample? Logistic Regression with weights Weight cases using the variable standwt (Standardized weight) Use SPSS to rerun a logistic regression model with Q22a. “Have you ever looked online for -- Information about a specific disease or medical problem?” as your dependent variable, Sex as the independent variable, and Receduc as a covariate. How does weighting the cases change the outcome of the logistic regression? Discuss why it is important to weight cases from surveys with complex sampling schemes using the differing outcomes you have from parts 2 and 3 of this assignment.
5 pages
Order 27450741 Exploring Relationships Between Two Variables
Crimes may be classified as either property crime or violent crimes. That has been speculation that hard criminals are eng ...
Order 27450741 Exploring Relationships Between Two Variables
Crimes may be classified as either property crime or violent crimes. That has been speculation that hard criminals are engaged in violent crimes while ...
MAT 154 Grand Canyon University Modeling a Problem Statistics Project
: Consider one way of modeling a problem. Say you have a device an in any given year there is about a 1 in 6 chance that t ...
MAT 154 Grand Canyon University Modeling a Problem Statistics Project
: Consider one way of modeling a problem. Say you have a device an in any given year there is about a 1 in 6 chance that the device will fail. A question is, “On average, how long will it be before such a device fails?” This sort of problem is what will be modeled and analyzed here.
Earn money selling
your Study Documents