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Lq 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. (?) C. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last more than 155 days. (b) Suppose a random sample of 18 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. ests The sampling distribution of x is normal with us = 158.00 and o; = 2.1213. tivity (Round to four decimal places as needed.) (c) What is the probability that a random sample of 18 pregnancies has a mean gestation period of 155 days or less? The probability that the mean of a random sample of 18 pregnancies is less than 155 days is approximately 0.0793 (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. (Round to the nearest integer as needed.) A. 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 onten exactly 155 days. Incorrect: 0 O B. 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 155 days or less. O 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 14) Succes 155 days or more. dia Lib e Option Help me solve this View an example Get more help - Clear all Check