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b. Explain why we need to use the t distribution. What assumption do you need a. What is the value of the population mean? What is the best estimate of this value? with a standard deviation of 20 gallons. Assume the population distribution is normal. to make? S. For a 90% confidence interval, what is the value of1? d. Develop the 90% confidence interval for the population mean Would it be reasonable to conclude that the population mean is 48 gallon otirom

b. Explain why we need to use the t distribution. What assumption do you need a. What is the value of the population mean? What is the best estimate of this value? with a standard deviation of 20 gallons. Assume the population distribution is normal. to make? S. For a 90% confidence interval, what is the value of1? d. Develop the 90% confidence interval for the population mean Would it be reasonable to conclude that the population mean is 48 gallon otirom

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Develop a 98% confidence Interval for the population mean. Interpret the result a. What is the value of the population mean? What is the best estimate of this value? with a standard deviation of 20 gallons. Assume the population distribution is b. Explain why we need to use the t distribution. What assumption do you need CHAPTER 9 normal. to make? c. For a 90% confidence interval, what is the value of ? d. Develop the 90% confidence interval for the population mean. . Would it be reasonable to conclude that the population mean is 48 galon 13. FILE Merrll Lynch Securities and Health Care Retirement Inc. are two large om ers in downtown Toledo, Ohlo. They are considering jointly offering child care their employees. As a part of the feasibility study, they wish to estimate the mese weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week. $107 $92 $97 $95 $105 $101 $91 $99 $95 $104 Develop a 90% confidence intervai for the population mean. Interpret the result. 14. FILE The Columbus, Ohio Area Chamber of Commerce wants to estimate the mean time workers who are empioyed in the downtown area spend getting to work. A sample of 15 workers reveals the following number of minutes spent traveling. 14 24 24 19 24 7 31 20 26 23 23 28 16 15 21 Develop a 98% confidence Interval for the population mean. Interpret the resu
Transcribed Image Text:Develop a 98% confidence Interval for the population mean. Interpret the result a. What is the value of the population mean? What is the best estimate of this value? with a standard deviation of 20 gallons. Assume the population distribution is b. Explain why we need to use the t distribution. What assumption do you need CHAPTER 9 normal. to make? c. For a 90% confidence interval, what is the value of ? d. Develop the 90% confidence interval for the population mean. . Would it be reasonable to conclude that the population mean is 48 galon 13. FILE Merrll Lynch Securities and Health Care Retirement Inc. are two large om ers in downtown Toledo, Ohlo. They are considering jointly offering child care their employees. As a part of the feasibility study, they wish to estimate the mese weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week. $107 $92 $97 $95 $105 $101 $91 $99 $95 $104 Develop a 90% confidence intervai for the population mean. Interpret the result. 14. FILE The Columbus, Ohio Area Chamber of Commerce wants to estimate the mean time workers who are empioyed in the downtown area spend getting to work. A sample of 15 workers reveals the following number of minutes spent traveling. 14 24 24 19 24 7 31 20 26 23 23 28 16 15 21 Develop a 98% confidence Interval for the population mean. Interpret the resu
9. Use Appendix B.5 to locate the value of t under the following conditions. a. The sample size is 12 and the level of confidence Is 95%. b. The sample size Is 20 and the level of confidence Is 90%. c. The sample size Is 8 and the level of confidence Is 99%. 10. Use Appendlx B.5 to loçate the value of t under the following conditions. a. The sample size is 15 and the level of confidence is 95%. b. The sample size is 24 and the, level of confidence is 98%. c. The sample size Is 12 and the level of confidence Is 90%. 11. The owner of Britten's Egg Farm wants to estimate the mean number of eggs pro- duced per chlicken. A sample of 20 chickens shows they produced an average of 20 eggs per month with a standard devlatlon of 2 eggs per month. a. What Is the value of the populatlon mean? What is the best estimate of this value? b. Explaln why we need to use the t distribution. What assumption do you need to make? c. For a 95% confidence Interval, what is the value of t? d. Develop the 95% confidence interval for the population mean. e. Would it be reasonable to conclude that the population mean is 21 eggs? What about 25 eggs? 12. The U.S. Dalry Industry wants to estimate the mean yearly mlik consumption. A sample of 16 people reveals the mean yearly consumption to be 45 gallons
Transcribed Image Text:9. Use Appendix B.5 to locate the value of t under the following conditions. a. The sample size is 12 and the level of confidence Is 95%. b. The sample size Is 20 and the level of confidence Is 90%. c. The sample size Is 8 and the level of confidence Is 99%. 10. Use Appendlx B.5 to loçate the value of t under the following conditions. a. The sample size is 15 and the level of confidence is 95%. b. The sample size is 24 and the, level of confidence is 98%. c. The sample size Is 12 and the level of confidence Is 90%. 11. The owner of Britten's Egg Farm wants to estimate the mean number of eggs pro- duced per chlicken. A sample of 20 chickens shows they produced an average of 20 eggs per month with a standard devlatlon of 2 eggs per month. a. What Is the value of the populatlon mean? What is the best estimate of this value? b. Explaln why we need to use the t distribution. What assumption do you need to make? c. For a 95% confidence Interval, what is the value of t? d. Develop the 95% confidence interval for the population mean. e. Would it be reasonable to conclude that the population mean is 21 eggs? What about 25 eggs? 12. The U.S. Dalry Industry wants to estimate the mean yearly mlik consumption. A sample of 16 people reveals the mean yearly consumption to be 45 gallons
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