Introductory Statistics
Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Chapter 10, Problem 118H

Use the following information to answer the next two exercises. An experiment is conducted to show that blood pressure can be consciously reduced in people trained in a “biofeedback exercise program.” Six subjects were randomly selected and blood pressure measurements were recorded before and after the training. The difference between blood pressures was calculated (after - before) producing the following results: x ¯ d = 10.2 d = 8.4 . Using the data, test the hypothesis that the blood pressure has decreased after the training.

The distribution for the test is:

a. t 5

b. t 6

c. N ( 1 0. 2 ,  8 . 4 )

d. N ( 1 0. 2 , 8 . 4 6 6 )

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Chapter 10 Solutions

Introductory Statistics

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