A physical therapist wanted to know whether the mean step pulse of men was less
ID: 3223323 • Letter: A
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 51men and 80 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 men Vs. Woman
Men
Women
N Mean St.Dev. SEMEAN
Men 51 112.1 11.7 1.6
Women 80 118.2 14.3 1.6
(b) Identify the P-value and state the researcher's conclusion if the level of significance was
=0.01. What is the P-value?
95% CI for mu Men-mu women
(-10.66,-1.54)
T-test mu men=mu women (vs<)
T=-2.66 P=0.0044, DF=121
(c) What is the 95%
confidence interval for the mean difference in pulse rates of men versus women? Interpret this result.
Explanation / Answer
From the given output,
b) p - value = 0.0044
c) 95% confidence interval: (-10.66, -1.54)
We are 95% confident that the mean difference in pulse rates of men versus women will lie between -10.66 and -1.54,
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