Assume that females have pulse rates that are normally distributed with a mean of 75 0 beats per minute and a standard deviation of o 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 less than 79 beats per minute The probability is 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 79 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 OA Since the mean pulse rate exceeds 30 the distribution of sample means is a normal distribution for any sample size OB Since the distribution is of individuals not sample means the distribution is a normal distribution for any sample size OC Since the original population has a normal distribution the distribution of sample means is a normal distribution for any sample size OD Since the distribution is of sample means not individuals the distribution is a normal distribution for any