Question
Assume that females have pulse rates that are normal y distributed ith a mean o -720 beats per minute and a standard dr ation of o-12 boats per minute Complete parts (a) through (c) below a. If 1 aduit female is randomly selected, find the probability that her pulse rate is less than 76 beats per minute The probability is (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 less than 76 beats per minute. The probability is (Round to four decimal places as needed.) e. Why can the nomal distribution be used inpart (b), even though the sample size does not exceed 307 A. Since the original population has a normal distribution, the distribution of sample means is a non a dist but on for any sample sza B. Snce the distribution is of individuals, not sample means, the distribution is a normal distribution or any timele san. O c. Since the distribution is of sample means, not individuals, the distribution is a normal distribution for any sample size. O D. Sincen the mean nulsn rate excneds 30 the distrihution of samole means is a normal distribution for anv sample size Click to select your answer(s).
Explanation / Answer
mean 72 sd 12.5 1) P(X