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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 60 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.

(a) State the null and alternative hypotheses. Which is correct?

(b) Identify the -value and state the researcher’s conclusion if the level of significance was . What is the -value?

(c) What is the 90% confidence interval for the mean difference in pulse rates of men versus women? Interpret this result.