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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, 85 new hires took the test and scored a mean of 113.1 points with a standard deviation of 16.4. Last year, 60 new hires took the test and scored a mean of 116.9 points with a standard deviation of 18. 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 H1-H2, the difference between the mean test score u, of new hires from the current vear and the mean test score u, of new hires from last year. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: || Upper limit:

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, 85 new hires took the test and scored a mean of 113.1 points with a standard deviation of 16.4. Last year, 60 new hires took the test and scored a mean of 116.9 points with a standard deviation of 18. 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 H1-H2, the difference between the mean test score u, of new hires from the current vear and the mean test score u, of new hires from last year. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: || Upper limit:

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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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, 85 new hires took the test and scored a mean of 113.l points with a standard deviation of 16.4. Last year, 60 new hires took the test and scored a mean of 116.9 points with a standard deviation of 18. 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 the difference between the mean test score u, of new hires from the current vear and the mean test scoreu, of new hires from last year. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: I Upper limit: Submit Assignment Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use | Privacy Accessibility 0 門 99+ pe here to search
Transcribed Image Text: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, 85 new hires took the test and scored a mean of 113.l points with a standard deviation of 16.4. Last year, 60 new hires took the test and scored a mean of 116.9 points with a standard deviation of 18. 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 the difference between the mean test score u, of new hires from the current vear and the mean test scoreu, of new hires from last year. Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.) Lower limit: I Upper limit: Submit Assignment Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use | Privacy Accessibility 0 門 99+ pe here to search
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