Assume that females have pulse rate: that are normally distributed with a mean of '1: i311 beats per minute and a standard deviation of 6 =12.5 beats per minute. Complete parts {a} through (c) below. a. it 1 adult temaie is randomly selected, find the probability that her pulse rate is between 67 beats per minute and 79 beats per minute. The probability is . (Round to tour decimal places as needed.) b. If 25 adult females are randomly selected, nd the probability that they have puise rates with a mean between 5? beats per minute and 79 beats per minute. The probability is . (Round to tour decimal places as needed.) c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30? O A. Since the distribution is of sample means. not individuals, the distribution is a normal distribution for any sample size. 0 B. Since the distribution is of individuals, not sample means, the distribution is a normal distibution for anyr sample size. 0 C, Since the mean pulse rate exceeds 30, the distribution of sample means is a normal distribution for any sample size. 0 D. Since the original population has a normal distribution, the distiibution of sample means is a normal distribution for any sample size