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2. The data below represent the amounts of time (in minutes) spent checking email for a random sample of employees at a company. Assume the times are normally distributed. 7.5 2.0 12.1 8.8 9.4 7.3 1.9 2.8 7.0 7.3 a. Find a point estimate for the population mean. b. Construct a 90% confidence interval for the population mean. Interpret the results. C. If we change the level of confidence to 95%, would the confidence interval would be shorter or wider than your answer in (c)? Explain. (Working the problem is not necessary.)

2. The data below represent the amounts of time (in minutes) spent checking email for a random sample of employees at a company. Assume the times are normally distributed. 7.5 2.0 12.1 8.8 9.4 7.3 1.9 2.8 7.0 7.3 a. Find a point estimate for the population mean. b. Construct a 90% confidence interval for the population mean. Interpret the results. C. If we change the level of confidence to 95%, would the confidence interval would be shorter or wider than your answer in (c)? Explain. (Working the problem is not necessary.)

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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2. The data below represent the amounts of time (in minutes) spent checking email for a random sample of employees at a company. Assume the times are normally distributed. 7.5, 2.0, 12.1, 8.8, 9.4, 7.3, 1.9, 2.8, 7.0, 7.3 a. Find a point estimate for the population mean. b. Construct a 90% confidence interval for the population mean. Interpret the results. c. If we change the level of confidence to 95%, would the confidence interval be shorter or wider than your answer in (c)? Explain. (Working the problem is not necessary.)
Transcribed Image Text:2. The data below represent the amounts of time (in minutes) spent checking email for a random sample of employees at a company. Assume the times are normally distributed. 7.5, 2.0, 12.1, 8.8, 9.4, 7.3, 1.9, 2.8, 7.0, 7.3 a. Find a point estimate for the population mean. b. Construct a 90% confidence interval for the population mean. Interpret the results. c. If we change the level of confidence to 95%, would the confidence interval be shorter or wider than your answer in (c)? Explain. (Working the problem is not necessary.)
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