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 55 men and 79 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
men n: 55, mean: 112.4, stdev: 11.8, se mean: 1.6
women n: 79, mean: 118.3, stdev: 14.4, se mean: 1.6
98% ci for mu men - mu women (-11.29, - 0.51)
t - test mu men = mu women (vs < )
t=-2.60 p = 0.0052 df = 128
a. reject ( h_0 ), there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women
b. fail to reject ( h_0 ), there is sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women
c. fail to reject ( h_0 ), there is not sufficient evidence to conclude that the mean step pulse of men was less than the mean step pulse of women
d. reject ( h_0 ), 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?
the lower bound is
the upper bound is
(round to two decimal places as needed)

Explanation:

Step1: Identify the confidence interval values

The problem provides the 98% CI for mu Men - mu Women as (- 11.29, - 0.51)

Answer:

The lower bound is - 11.29.
The upper bound is - 0.51.