Mean=277

standard deviation = 28

whar

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean p=277 days and standard deviation o = 28 days. Complete parts (a) through (f) belo Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability that a randomly selected pregnancy lasts less than 268 days? The probability that a randomly selected pregnancy lasts less than 268 days is approximately (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.) O A. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last exactly 268 days. O B. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last more than 268 days O C. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last less than 268 days (b) Suppose a random sample of 21 pregnancies is obtained Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x is with us and a = (Round to four decimal places as needed.) (c) What is the probability that a random sample of 21 pregnancies has a mean gestation period of 268 days or less? The probability that the mean of a random sample of 21 pregnancies is less than 268 days is approximately (Round to four decimal places as needed.) Intoment this noahshility Colast that corrent chains halouse and fill in the amount hav within union chains