Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0μ=72.0 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 6666 beats per minute and 7878 beats per minute. The probability is _. (Round to four decimal places as needed.) b. If 1616 adult females are randomly selected, find the probability that they have pulse rates with a mean between 6666 beats per minute and 7878 beats per minute. The probability is . (Round to four decimal places as needed.) c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30? A. Since the mean pulse rate exceeds 30, the distribution of sample means is a normal distribution for any sample size. B. Since the distribution is of sample means, not individuals, the distribution is a normal distribution for any sample size. C. Since the distribution is of individuals, not sample means, the distribution is a normal distribution for any sample size. D. Since the original population has a normal distribution, the distribution of sample means is a normal distribution for any sample size.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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

mu equals 72.0μ=72.0 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

6666 beats per minute and 7878 beats per minute.

The probability is _____.

(Round to four decimal places as needed.)

b. If 1616 adult females are randomly selected, find the probability that they have pulse rates with a mean between 6666 beats per minute and 7878 beats per minute.

The probability is ____.

(Round to four decimal places as needed.)

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

Since the mean pulse rate exceeds 30, the distribution of sample means is a normal distribution for any sample size.

Since the distribution is of sample means, not individuals, the distribution is a normal distribution for any sample size.

Since the distribution is of individuals, not sample means, the distribution is a normal distribution for any sample size.

Since the original population has a normal distribution, the distribution of sample means is a normal distribution for any sample size.

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