Question

Assume that females have pulse rates that are normally distributed with a mean of

mu equals 74.0μ=74.0

beats per minute and a standard deviation of

sigma equals 12.5σ=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

70 beats per minute and 78

beats per minute.

A) The probability is .2510

​(Round to four decimal places as​ needed.)

b. If 16 adult females are randomly​ selected, find the probability that they have pulse rates with a mean between

70 beats per minute and 78 beats per minute.The probability is________

​(Round to four decimal places as​ needed.)

Answer 1

Refer Standard normal table/Z-table to find the probability or use excel formula "=NORM.S.DIST(0.32, TRUE)" & "=NORM.S.DIST(-0.32, TRUE)" to find the probability.

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Refer Standard normal table/Z-table to find the probability or use excel formula "=NORM.S.DIST(1.28, TRUE)" & "=NORM.S.DIST(-1.28, TRUE)" to find the probability.