An investigator theorizes that people who participate in regular exercise will have levels of systolic blood pressure that are significantly different, higher or lower, from that of people who do not participate in regular exercise. To test this idea, the investigator randomly assigns 21 subjects to an exercise program for 10 weeks and another 21 subjects to a non-exercise comparison group. After ten weeks, the mean systolic blood pressure of the subjects in the exercise group is M₁ = 127 and the standard deviation is s₁ = 10. In the non-exercise group, the mean is M₂ = 137 and the standard deviation is s2 = 9.0. Please test the investigator's theory using an alpha level of 0.05, two tailed.

An investigator theorizes that people who participate in regular exercise will have levels of systolic blood pressure that are significantly different, higher or lower, from that of people who do not participate in regular exercise. To test this idea, the investigator randomly assigns 21 subjects to an exercise program for 10 weeks and another 21 subjects to a non-exercise comparison group. After ten weeks, the mean systolic blood pressure of the subjects in the exercise group is M₁ = 127 and the standard deviation is s₁ = 10. In the non-exercise group, the mean is M₂ = 137 and the standard deviation is s2 = 9.0. Please test the investigator's theory using an alpha level of 0.05, two tailed.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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