A physical therapist wanted to know whether the mean step pulse of men was less

Question

A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 53 men and 77 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women Mean 112.5 118.4 StDev 11.8 14.3 SE Mean 53 1.6 98% CI for mu Men-mu Women -11.36,-0.44) T-Test mu Men mu Women (vs s) T= _ 2.57 P= 0.0057 DF= 123 P-value= 0.0057 State the researcher's conclusion. Which of the following is correct? A. Reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women O B. Reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women C. Fail to reject Ho, there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women D. Fail to reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women (c) What is the 98% confidence interval for the mean difference in pulse rates of men versus women? (Use ascending order. Round to two decimal places as needed.)

Explanation / Answer

From the data given above, the 98% confidence interval will be

( - 11.36 , -0.44)

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