Question

Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0 beats per minute and a standard deviation of sigma equals 12.5 beats per minute. Complete parts​ (a) through​ (c) below.

a. If 1 adult female is randomly​ selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute. the probability is?

b. If 16 adult females are randomly​ selected, find the probability that they have pulse rates with a mean between 65 beats per minute and 79 beats per minute. the probability is?

c. Why can the normal distribution be used in part​ (b), even though the sample size does not exceed​ 30?

Answer 1

TOPIC:Use of the Normal distribution.