Comparing Step Pulses A physical therapist wanted to know whether the mean step pulse of

Chapter 11, Problem 23

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Comparing Step Pulses 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 51 men and 70 women to participate in the study. Each subject was required to step up and down onto a 6-inch platform for 3 minutes. The pulse of each subject (in beats per minute) was then recorded. After the data were entered into MINITAB, the following results were obtained Two Sample T-Test and Confidence Interval Men Women Two sample T for Men vs Women 95% CI for mu Men mu Women: (10.7, 1.5) T-Test mu Men mu Women (vs ):T 2.61 P 0.0051 DF 118 N 51 70 Mean 112.3 118.3 StDev 11.3 14.2 SE Mean 1.6 1.7 (a) State the null and alternative hypotheses. (b) Identify the P-value and state the researchers conclusion if the level of significance was a = 0.01. (c) What is the 95% confidence interval for the mean difference in pulse rates of men versus women? Interpret this interval. 2