Assume that females have pulse rates that are normally distributed with a mean of 4 - 73.0 beats per minute and a standard deviation of a Complete parts (a) through (c) below. 12.5 beats per minute.
a. If 1 adult female is randomly selected, find the probability that her pulse rate is less than 80 beats per minute. The probability is enter your response here. (Round to four decimal places as needed.)
b. If 4 adult females are randomly selected, find the probability that they have pulse rates with a mean less than 80 beats per minute. The probability is enter your response here. (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?