Explanation From Problem 8.155, the following information are known. x ¯ 1 = mean of Baseline ( 2000 ) = 89.5 x ¯ 2 = mean of Baseline ( 2010 ) = 80.1 s 1 = standard deviation of Baseline ( 2000 ) = 5.4 s 2 = standard deviation of Baseline ( 2010 ) = 3.7 n 1 = number of observation in Baseline ( 2000 ) = 10 n 2 = number of observation in Baseline ( 2010 ) = 12 And the pooled variance s 2 = 20.65 . Step-by-step procedure to obtain critical value using Excel: In an empty cell of an Excel sheet, type “=T.INV.2T(0.05,20)”. Click Enter. The output obtained is as follows:

8th Edition

ISBN: 9781305268920

Author: Bernard Rosner

Publisher: Cengage Learning

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Chapter 8, Problem 157P

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Find the 95% confidence interval for the difference in mean baseline heart rate between starting an exercise program (2000) and after 10 years of regular exercise (2010).

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Chapter 8, Problem 156P

Chapter 8, Problem 158P

Chapter 8 Solutions

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Find the 95% confidence interval for the difference in mean baseline heart rate between starting an exercise program (2000) and after 10 years of regular exercise (2010).

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Find the 95% confidence interval for the difference in mean baseline heart rate between starting an exercise program (2000) and after 10 years of regular exercise (2010).

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Chapter 8 Solutions