Suppose the length of the pregnancies of a certain animal approximately normally distributed with a mean of mu 152 days and the standard deviation of 13 days What is the probability that a randomly selected pregnancy last less than 148 days Suppose a random sample of 17 pregnancies is obtained describe the sampling distribution of the sample mean length of the pregnancy what is the muX and Sigma X 4 decimal places What is the probability that random sample 17 pregnancy is the main gestational period of 148 days or less What is the probability that 60 pregnancies have a meeting gestational period of 148 days or less