Homework 8.1 question 7 answer for E

Sta Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 158 days and standard deviation o = 9 days. Complete parts (a) through (f) below. ses Home C. If 100 independent random samples of size n = 18 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of work 155 days or more. s & Tests (d) What is the probability that a random sample of 64 pregnancies has a mean gestation period of 155 days or less? nt Activity The probability that the mean of a random sample of 64 pregnancies is less than 155 days is approximately 0.0038. book (Round to four decimal places as needed.) Plan Interpret this probability. Select the correct choice below and fill in the answer box within your choice. (Round to the nearest integer as needed.) ebook O A. If 100 independent random samples of size n = 64 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of exactly 155 days. Crunch O B. If 100 independent random samples of size n = 64 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 155 days or more. pter Contents Incorrect C. If 100 independent random samples of size n = 64 pregnancies were obtained from this population, we would expect 0 sample(s) to have a sample mean of 155 days or less. xt (e) What might you conclude if a random sample of 64 pregnancies resulted in a mean gestation period of 155 days or less? Is for Success This result would be so the sample likely came from a population whose mean gestation period is 158 days. iltimedia Libra