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WU Wk 4 Sample Mean Standard Deviation and Confidence Interval Worksheet
For this Assignment, you are working at a firm that conducts independent testing for heavy industry. Recently, an automobi ...
WU Wk 4 Sample Mean Standard Deviation and Confidence Interval Worksheet
For this Assignment, you are working at a firm that conducts independent testing for heavy industry. Recently, an automobile manufacturer has been in the news for complaints about the highway gas mileage of their latest model minivan. You receive a contract from a consumer action group to test and write a report on the company’s claim that its minivans get 28 miles per gallon on the highway. The car company agrees to allow you to select randomly 35 low-mileage fleet minivans to test their highway mileage. Your test results gave you the following data: 29.7 24.5 27.1 29.8 29.2 27.0 27.8 24.1 29.3 25.9 26.2 24.5 32.8 26.8 27.8 24.0 23.6 29.2 26.5 27.7 27.1 23.7 24.1 27.2 25.9 26.7 27.8 27.3 27.6 22.8 25.3 26.6 26.4 27.1 26.1To prepare for this Assignment:Review this week’s Learning Resources.Refer to the scenario above and the data that was provided by the car company.Refer to the Academic Writing Expectations for 2000/3000-Level Courses as you compose your Assignment.By Day 7Submit Part 1 of your report according to the following prompts.Part 1: Sample Mean, Standard Deviation, and Confidence IntervalComplete the following and include your results and responses in your report:Include a brief introduction that provides a context for the assignment you have been given by your firm.Calculate a 95% confidence interval around your sample mean. (75 words, or 1 paragraph)Note: Include your calculations. If your calculations are submitted separately, make note of where they can be found.Is the company’s claimed mean inside your confidence interval? (75 words, or 1 paragraph)What does that result indicate about the company’s claim? (75 words, or 1 paragraph)Note: For each prompt, be sure to reference at least one scholarly source to support your answer. Use the Week 4 Assignment Template, provided in this week’s Learning Resources, to complete this Assignment.
MA215 Grantham Week 1 ROI Frequency Distribution Project Paper
Project Week 1 For these project assignments throughout the course you will need to reference the data in the ROI Excel sp ...
MA215 Grantham Week 1 ROI Frequency Distribution Project Paper
Project Week 1 For these project assignments throughout the course you will need to reference the data in the ROI Excel spreadheet. (Attached) In this data set – the ROI data set - for 2 different majors
(Business and Engineering), you are given a sample of the 20 best
colleges according to ROI (ROI = Return on Investment) and their ‘School
Type’, ‘Cost’, ’30-Year ROI’, and ‘Annual % ROI’. For each of the 2 majors create a pie chart using the column ‘School Type’. Comment on your results.For each of the 2 majors create a frequency distribution and
histogram using the column ‘Annual % ROI’. Group with starting at 6%
(0.06), ending at 11% (0.11), and go by 0.5% (0.005). For the histograms title your charts “Histogram Business
Major: Annual % ROI” for Business majors and “Histogram Engineering
Major: Annual % ROI” for Engineering Majors. Comment on your results.
4 pages
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country mo ...
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country more specifically in Equateur ...
How to divide polynomials
Simplify the expression.a. b. c. d. 6ab - 15ab^3Simplify the expression.a. b.  ...
How to divide polynomials
Simplify the expression.a. b. c. d. 6ab - 15ab^3Simplify the expression.a. b. c. d. Simplify the expression. a. b. c. d. Which of the following shows how you would correctly set up the following problem to divide using synthetic division. a. b. c. d. Which of the following shows the solution when the following synthetic division model is set up?a. b. c. d. Simplify the expression a. b. x-3c. d. Simplify the expression a. 3t2 -2t +3b. c. d. Simplify the expression.a. b. c. d. Divde.a. b. c. d. Divde.a. b. c. d.
Gulf Real Estate Properties
Gulf Real Estate Properties, Inc. is a real estate firm located in southwest Florida. The company, which advertises itself ...
Gulf Real Estate Properties
Gulf Real Estate Properties, Inc. is a real estate firm located in southwest Florida. The company, which advertises itself as an “expert in the real estate market,” monitors condominium sales by collecting data on location, list price, sale price, and the number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico, or No Gulf View if it is located on the bay or a golf course (near but not on the Gulf). Sample data from the Multiple Listing Service in Naples, Florida, provided sales data for 40 Gulf View condominiums and 18 No Gulf View condominiums. The complete data set is in the file named Real Estate, linked at the bottom of the page.Managerial ReportPrepare a report (see below) that summarizes your assessment of the nature of the housing market in southwest Florida. Be sure to include the following seven (7) items in your report.Descriptive statistics (mean, median, range, and standard deviation) to summarize each of the three variables for the 40 Gulf View condominiums. Are there any outliers in the data set for any of the three variables? If there are any outliers in any category, please list them and state for which category they are an outlier. Describe which method you used to make your determination.Descriptive statistics (mean, median, range, and standard deviation) to summarize each of the three variables for the 18 No Gulf View condominiums. Are there any outliers in the data set for any of the three variables? If there are any outliers in any category, please list them and state for which category they are an outlier. Describe which method you used to make your determination.Compare your summary results from #1 and #2. Discuss any specific statistical results that would help a real estate agent understand the condominium market.Develop a 95% confidence interval estimate of the population mean sales price and population mean number of days to sell for Gulf View condominiums. Interpret your results.Develop a 95% confidence interval estimate of the population mean sales price and population mean number of days to sell for No Gulf View condominiums. Interpret your results.Assume the branch manager requested estimates of the mean selling price of Gulf View condominiums with a margin of error of $40,000 and the mean selling price of No Gulf View condominiums with a margin of error of $15,000. Using 95% confidence, how large should the sample sizes be for each?Gulf Real Estate Properties just signed contracts for two new listings: a Gulf View condominium with a list price of $589,000 and a No Gulf View condominium with a list price of $285,000. What is your estimate of the final selling price (based on the percent difference for the sale and list price) and number of days required to sell each of these units?Write a report that adheres to the Written Assignment Requirements under the heading “Expectations for CSU-Global Written Assignments” found in the CSU-Global Guide to Writing and APA Requirements. As with all written assignments at CSU-Global, you should have in-text citations and a reference page. An example paper is provided in the MTH410 Guide to Writing with Statistics, linked at the bottom of the page.Your report must contain the following:A title page in APA style.An introduction that summarizes the problem.The body of the paper should answer the questions posed in the problem by communicating the results of your analysis. Include results of calculations, as well as charts and graphs, where appropriate.A conclusion paragraph that addresses your findings and what you have determined from the data and your analysis. Submit your Excel file in addition to your report.
statistcs question
Problem 1 You wish to determine the GPA of students at your school. Describe whatprocess you would go through to collect ...
statistcs question
Problem 1 You wish to determine the GPA of students at your school. Describe whatprocess you would go through to collect a sample if you use a systematic sample. Problem 2 The number of deaths in the US due to carbon monoxide (CO) poisoning fromgenerators from the years 1999 to 2011 are in table #1 (Hinatov, 2012). Create a bar chart and pie chart of this data. State any findings you see from the graph. Table #1: Data of Number of Deaths Due to CO Poisoning Region Number of deaths from CO while using a generator Urban Core 401 Sub-Urban 97 Large Rural 86 Small Rural/Isolated 111 Problem 3 The density of people per square kilometer for African countries is in table#2 ("Density of people," 2013). a.) Create a frequency distribution, relativefrequency distribution, and cumulative frequency distribution using 8 classes. b.) Create a histogram for the data in table #2.Describe the shape and any findings you can from the graph. c.) Create an ogive for the data in table #2. Describe any findings you can from the graph. Table #2: Data of Density of People per Square Kilometer 15 16 81 3 62 367 42 123 8 9 337 12 29 70 39 83 26 51 79 6 157 105 42 45 72 72 37 4 36 134 12 3 630 563 72 29 3 13 176 341 415 187 65 194 75 16 41 18 69 49 103 65 143 2 18 31 Problem 4 The World Bank collects information on the life expectancy of a person in eachcountry ("Life expectancy at," 2013) and the fertility rate per woman in thecountry ("Fertility rate," 2013). The data for 24 randomly selected countries forthe year 2011 are in table #3. Create a scatter plot of the data and state if thereappears to be a relationship between life expectancy and the number of births perwoman. Table #3: Data of Life Expectancy versus Fertility Rate Life Expectancy Fertility Rate Life Expectancy Fertility Rate 77.2 1.7 72.3 3.9 55.4 5.8 76.0 1.5 69.9 2.2 66.0 4.2 76.4 2.1 55.9 5.2 75.0 1.8 54.4 6.8 78.2 2.0 62.9 4.7 73.0 2.6 78.3 2.1 70.8 2.8 72.1 2.9 82.6 1.4 80.7 1.4 68.9 2.6 74.2 2.5 81.0 1.5 73.3 1.5 54.2 6.9 67.1 2.1 Problem 5 Cholesterol levels were collected from patients two days after they had a heartattack (Ryan, Joiner & Ryan, Jr, 1985) and are in table #4. Find the mean,median, range, variance, and standard deviation using technology. Table #4: Cholesterol Levels 270 236 210 142 280 272 160 220 226 242 186 266 206 318 294 282 234 224 276 282 360 310 280 278 288 288 244 236 Problem 6 Eyeglassomatic manufactures eyeglasses for different retailers. They test to seehow many defective lenses they made in a time period. Table #5 gives thedefect and the number of defects. Table #5: Number of Defective Lenses Defect type Number of Defects Scratch 5865 Right shaped – small 4613 Flaked 1992 Wrong axis 1838 Chamfer wrong 1596 Crazing, cracks 1546 Wrong shape 1485 Wrong PD 1398 Spots and bubbles 1371 Wrong height 1130 Right shape – big 1105 Lost in lab 976 Spots/bubble – intern 976 a.) Find the probability of picking a lens that is scratched or flaked. b.) Find the probability of picking a lens that is the wrong PD or was lost in lab. c.) Find the probability of picking a lens that is not scratched. d.) Find the probability of picking a lens that is not the wrong shape. Problem 7 According to an article in the American Heart Association’s publicationCirculation, 24% of patients who had been hospitalized for an acute myocardialinfarction did not fill their cardiac medication by the seventh day of beingdischarged (Ho, Bryson & Rumsfeld, 2009). Suppose there are twelve peoplewho have been hospitalized for an acute myocardial infarction. a.) State the random variable. b.) Argue that this is a binomial experiment Find the probability that c.) All filled their cardiac medication. d.) Seven did not fill their cardiac medication. e.) None filled their cardiac medication. f.) At most two did not fill their cardiac medication. Problem 8 The mean starting salary for nurses is $67,694 nationally ("Staff nurse -," 2013).The standard deviation is approximately $10,333. Assume that the starting salaryis normally distributed. a.) State the random variable. b.) Find the probability that a starting nurse will make more than $80,000. c.) Find the probability that a starting nurse will make less than $60,000. d.) If a nurse made less than $50,000, would you think the nurse was under paid? Why or why not? Problem 9 The WHO MONICA Project collected blood pressure data for people in China (Kuulasmaa, Hense&Tolonen, 1998). Data based on information from the study is in table #6. Determine if the data is from a population that is normallydistributed. Table #6: Blood Pressure Values for People in China 114 141 154 137 131 132 133 156 119 138 86 122 112 114 177 128 137 140 171 129 127 104 97 135 107 136 118 92 182 150 142 97 140 106 76 115 119 125 162 80 138 124 132 143 119 Problem 10 The size of fish is very important to commercial fishing. A study conducted in2012 found the length of Atlantic cod caught in nets in Karlskrona to have a meanof 49.9 cm and a standard deviation of 3.74 cm (Ovegard, Berndt &Lunneryd, 2012). The length of fish is normally distributed. A sample of 15 fish is taken. a.) State the random variable. b.) Find the mean and standard deviation of the sample mean. c.) Find the probability that the sample mean length of the Atlantic cod is lessthan 52 cm. d.) Find the probability that the sample mean length of the Atlantic cod is morethan 74 cm. e.) If you found sample mean length for Atlantic cod to be more than 74 cm, whatcould you conclude?
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WU Wk 4 Sample Mean Standard Deviation and Confidence Interval Worksheet
For this Assignment, you are working at a firm that conducts independent testing for heavy industry. Recently, an automobi ...
WU Wk 4 Sample Mean Standard Deviation and Confidence Interval Worksheet
For this Assignment, you are working at a firm that conducts independent testing for heavy industry. Recently, an automobile manufacturer has been in the news for complaints about the highway gas mileage of their latest model minivan. You receive a contract from a consumer action group to test and write a report on the company’s claim that its minivans get 28 miles per gallon on the highway. The car company agrees to allow you to select randomly 35 low-mileage fleet minivans to test their highway mileage. Your test results gave you the following data: 29.7 24.5 27.1 29.8 29.2 27.0 27.8 24.1 29.3 25.9 26.2 24.5 32.8 26.8 27.8 24.0 23.6 29.2 26.5 27.7 27.1 23.7 24.1 27.2 25.9 26.7 27.8 27.3 27.6 22.8 25.3 26.6 26.4 27.1 26.1To prepare for this Assignment:Review this week’s Learning Resources.Refer to the scenario above and the data that was provided by the car company.Refer to the Academic Writing Expectations for 2000/3000-Level Courses as you compose your Assignment.By Day 7Submit Part 1 of your report according to the following prompts.Part 1: Sample Mean, Standard Deviation, and Confidence IntervalComplete the following and include your results and responses in your report:Include a brief introduction that provides a context for the assignment you have been given by your firm.Calculate a 95% confidence interval around your sample mean. (75 words, or 1 paragraph)Note: Include your calculations. If your calculations are submitted separately, make note of where they can be found.Is the company’s claimed mean inside your confidence interval? (75 words, or 1 paragraph)What does that result indicate about the company’s claim? (75 words, or 1 paragraph)Note: For each prompt, be sure to reference at least one scholarly source to support your answer. Use the Week 4 Assignment Template, provided in this week’s Learning Resources, to complete this Assignment.
MA215 Grantham Week 1 ROI Frequency Distribution Project Paper
Project Week 1 For these project assignments throughout the course you will need to reference the data in the ROI Excel sp ...
MA215 Grantham Week 1 ROI Frequency Distribution Project Paper
Project Week 1 For these project assignments throughout the course you will need to reference the data in the ROI Excel spreadheet. (Attached) In this data set – the ROI data set - for 2 different majors
(Business and Engineering), you are given a sample of the 20 best
colleges according to ROI (ROI = Return on Investment) and their ‘School
Type’, ‘Cost’, ’30-Year ROI’, and ‘Annual % ROI’. For each of the 2 majors create a pie chart using the column ‘School Type’. Comment on your results.For each of the 2 majors create a frequency distribution and
histogram using the column ‘Annual % ROI’. Group with starting at 6%
(0.06), ending at 11% (0.11), and go by 0.5% (0.005). For the histograms title your charts “Histogram Business
Major: Annual % ROI” for Business majors and “Histogram Engineering
Major: Annual % ROI” for Engineering Majors. Comment on your results.
4 pages
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country mo ...
Outbreak Investigation
Ebola has affected the Democratic Republic of Congo more than one time; the 2014 virus outbreak occurred in the country more specifically in Equateur ...
How to divide polynomials
Simplify the expression.a. b. c. d. 6ab - 15ab^3Simplify the expression.a. b.  ...
How to divide polynomials
Simplify the expression.a. b. c. d. 6ab - 15ab^3Simplify the expression.a. b. c. d. Simplify the expression. a. b. c. d. Which of the following shows how you would correctly set up the following problem to divide using synthetic division. a. b. c. d. Which of the following shows the solution when the following synthetic division model is set up?a. b. c. d. Simplify the expression a. b. x-3c. d. Simplify the expression a. 3t2 -2t +3b. c. d. Simplify the expression.a. b. c. d. Divde.a. b. c. d. Divde.a. b. c. d.
Gulf Real Estate Properties
Gulf Real Estate Properties, Inc. is a real estate firm located in southwest Florida. The company, which advertises itself ...
Gulf Real Estate Properties
Gulf Real Estate Properties, Inc. is a real estate firm located in southwest Florida. The company, which advertises itself as an “expert in the real estate market,” monitors condominium sales by collecting data on location, list price, sale price, and the number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico, or No Gulf View if it is located on the bay or a golf course (near but not on the Gulf). Sample data from the Multiple Listing Service in Naples, Florida, provided sales data for 40 Gulf View condominiums and 18 No Gulf View condominiums. The complete data set is in the file named Real Estate, linked at the bottom of the page.Managerial ReportPrepare a report (see below) that summarizes your assessment of the nature of the housing market in southwest Florida. Be sure to include the following seven (7) items in your report.Descriptive statistics (mean, median, range, and standard deviation) to summarize each of the three variables for the 40 Gulf View condominiums. Are there any outliers in the data set for any of the three variables? If there are any outliers in any category, please list them and state for which category they are an outlier. Describe which method you used to make your determination.Descriptive statistics (mean, median, range, and standard deviation) to summarize each of the three variables for the 18 No Gulf View condominiums. Are there any outliers in the data set for any of the three variables? If there are any outliers in any category, please list them and state for which category they are an outlier. Describe which method you used to make your determination.Compare your summary results from #1 and #2. Discuss any specific statistical results that would help a real estate agent understand the condominium market.Develop a 95% confidence interval estimate of the population mean sales price and population mean number of days to sell for Gulf View condominiums. Interpret your results.Develop a 95% confidence interval estimate of the population mean sales price and population mean number of days to sell for No Gulf View condominiums. Interpret your results.Assume the branch manager requested estimates of the mean selling price of Gulf View condominiums with a margin of error of $40,000 and the mean selling price of No Gulf View condominiums with a margin of error of $15,000. Using 95% confidence, how large should the sample sizes be for each?Gulf Real Estate Properties just signed contracts for two new listings: a Gulf View condominium with a list price of $589,000 and a No Gulf View condominium with a list price of $285,000. What is your estimate of the final selling price (based on the percent difference for the sale and list price) and number of days required to sell each of these units?Write a report that adheres to the Written Assignment Requirements under the heading “Expectations for CSU-Global Written Assignments” found in the CSU-Global Guide to Writing and APA Requirements. As with all written assignments at CSU-Global, you should have in-text citations and a reference page. An example paper is provided in the MTH410 Guide to Writing with Statistics, linked at the bottom of the page.Your report must contain the following:A title page in APA style.An introduction that summarizes the problem.The body of the paper should answer the questions posed in the problem by communicating the results of your analysis. Include results of calculations, as well as charts and graphs, where appropriate.A conclusion paragraph that addresses your findings and what you have determined from the data and your analysis. Submit your Excel file in addition to your report.
statistcs question
Problem 1 You wish to determine the GPA of students at your school. Describe whatprocess you would go through to collect ...
statistcs question
Problem 1 You wish to determine the GPA of students at your school. Describe whatprocess you would go through to collect a sample if you use a systematic sample. Problem 2 The number of deaths in the US due to carbon monoxide (CO) poisoning fromgenerators from the years 1999 to 2011 are in table #1 (Hinatov, 2012). Create a bar chart and pie chart of this data. State any findings you see from the graph. Table #1: Data of Number of Deaths Due to CO Poisoning Region Number of deaths from CO while using a generator Urban Core 401 Sub-Urban 97 Large Rural 86 Small Rural/Isolated 111 Problem 3 The density of people per square kilometer for African countries is in table#2 ("Density of people," 2013). a.) Create a frequency distribution, relativefrequency distribution, and cumulative frequency distribution using 8 classes. b.) Create a histogram for the data in table #2.Describe the shape and any findings you can from the graph. c.) Create an ogive for the data in table #2. Describe any findings you can from the graph. Table #2: Data of Density of People per Square Kilometer 15 16 81 3 62 367 42 123 8 9 337 12 29 70 39 83 26 51 79 6 157 105 42 45 72 72 37 4 36 134 12 3 630 563 72 29 3 13 176 341 415 187 65 194 75 16 41 18 69 49 103 65 143 2 18 31 Problem 4 The World Bank collects information on the life expectancy of a person in eachcountry ("Life expectancy at," 2013) and the fertility rate per woman in thecountry ("Fertility rate," 2013). The data for 24 randomly selected countries forthe year 2011 are in table #3. Create a scatter plot of the data and state if thereappears to be a relationship between life expectancy and the number of births perwoman. Table #3: Data of Life Expectancy versus Fertility Rate Life Expectancy Fertility Rate Life Expectancy Fertility Rate 77.2 1.7 72.3 3.9 55.4 5.8 76.0 1.5 69.9 2.2 66.0 4.2 76.4 2.1 55.9 5.2 75.0 1.8 54.4 6.8 78.2 2.0 62.9 4.7 73.0 2.6 78.3 2.1 70.8 2.8 72.1 2.9 82.6 1.4 80.7 1.4 68.9 2.6 74.2 2.5 81.0 1.5 73.3 1.5 54.2 6.9 67.1 2.1 Problem 5 Cholesterol levels were collected from patients two days after they had a heartattack (Ryan, Joiner & Ryan, Jr, 1985) and are in table #4. Find the mean,median, range, variance, and standard deviation using technology. Table #4: Cholesterol Levels 270 236 210 142 280 272 160 220 226 242 186 266 206 318 294 282 234 224 276 282 360 310 280 278 288 288 244 236 Problem 6 Eyeglassomatic manufactures eyeglasses for different retailers. They test to seehow many defective lenses they made in a time period. Table #5 gives thedefect and the number of defects. Table #5: Number of Defective Lenses Defect type Number of Defects Scratch 5865 Right shaped – small 4613 Flaked 1992 Wrong axis 1838 Chamfer wrong 1596 Crazing, cracks 1546 Wrong shape 1485 Wrong PD 1398 Spots and bubbles 1371 Wrong height 1130 Right shape – big 1105 Lost in lab 976 Spots/bubble – intern 976 a.) Find the probability of picking a lens that is scratched or flaked. b.) Find the probability of picking a lens that is the wrong PD or was lost in lab. c.) Find the probability of picking a lens that is not scratched. d.) Find the probability of picking a lens that is not the wrong shape. Problem 7 According to an article in the American Heart Association’s publicationCirculation, 24% of patients who had been hospitalized for an acute myocardialinfarction did not fill their cardiac medication by the seventh day of beingdischarged (Ho, Bryson & Rumsfeld, 2009). Suppose there are twelve peoplewho have been hospitalized for an acute myocardial infarction. a.) State the random variable. b.) Argue that this is a binomial experiment Find the probability that c.) All filled their cardiac medication. d.) Seven did not fill their cardiac medication. e.) None filled their cardiac medication. f.) At most two did not fill their cardiac medication. Problem 8 The mean starting salary for nurses is $67,694 nationally ("Staff nurse -," 2013).The standard deviation is approximately $10,333. Assume that the starting salaryis normally distributed. a.) State the random variable. b.) Find the probability that a starting nurse will make more than $80,000. c.) Find the probability that a starting nurse will make less than $60,000. d.) If a nurse made less than $50,000, would you think the nurse was under paid? Why or why not? Problem 9 The WHO MONICA Project collected blood pressure data for people in China (Kuulasmaa, Hense&Tolonen, 1998). Data based on information from the study is in table #6. Determine if the data is from a population that is normallydistributed. Table #6: Blood Pressure Values for People in China 114 141 154 137 131 132 133 156 119 138 86 122 112 114 177 128 137 140 171 129 127 104 97 135 107 136 118 92 182 150 142 97 140 106 76 115 119 125 162 80 138 124 132 143 119 Problem 10 The size of fish is very important to commercial fishing. A study conducted in2012 found the length of Atlantic cod caught in nets in Karlskrona to have a meanof 49.9 cm and a standard deviation of 3.74 cm (Ovegard, Berndt &Lunneryd, 2012). The length of fish is normally distributed. A sample of 15 fish is taken. a.) State the random variable. b.) Find the mean and standard deviation of the sample mean. c.) Find the probability that the sample mean length of the Atlantic cod is lessthan 52 cm. d.) Find the probability that the sample mean length of the Atlantic cod is morethan 74 cm. e.) If you found sample mean length for Atlantic cod to be more than 74 cm, whatcould you conclude?
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