The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 75 new hires took the test and scored a mean of 113.6 points with a standard deviation of 14.9. Last year, 100 new hires took the test and scored a mean of 116.4 points with a standard deviation of 14.6. Assume that the population standard deviations of the test scores of all new hires in the current year and the test scores of all new hires last year can be estimated by the sample standard deviations, as the samples used were quite large. Construct a 90% confidence interval for u,-u, the difference between the mean test score u, of new hires from the current year and the mean test score u, of new hires from last year. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. What is the lower limit of the 90% confidence interval? What is the upper limit of the 90% confidence interval?

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 75 new hires took the test and scored a mean of 113.6 points with a standard deviation of 14.9. Last year, 100 new hires took the test and scored a mean of 116.4 points with a standard deviation of 14.6. Assume that the population standard deviations of the test scores of all new hires in the current year and the test scores of all new hires last year can be estimated by the sample standard deviations, as the samples used were quite large. Construct a 90% confidence interval for u,-u, the difference between the mean test score u, of new hires from the current year and the mean test score u, of new hires from last year. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. What is the lower limit of the 90% confidence interval? What is the upper limit of the 90% confidence interval?

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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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