Do Homework - Ch 8 HW: Sampling Distribution - Work - Microsoft Edge to X https://www.mathxl.com/Student/PlayerHomework.aspx?homeworkld=616208164&questionld=7&flushed=false&cld=67977838centerwin=yes STP226online_Sullivan5e_SPA22_Jackiewicz Caitlin Dull 02/08/22 6:25 PM E Homework: Ch 8 HW: Sampling Distribution Question 7, 8.1.19-T HW Score: 88.07%, 16.73 of 19 points Save Part 6 of 9 Points: 0.58 of 1 Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 248 days and standard deviation o = 23 days. Complete parts (a) through (f) below. (Round to the nearest integer as needed.) A. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last more than 240 days. B. If 100 pregnant individuals were selected independently from this population, we would expect 36 pregnancies to last less than 240 days. C. If 100 pregnant individuals were selected independently from this population, we would expect pregnancies to last exactly 240 days (b) Suppose a random sample of 23 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies The sampling distribution of x is normal with u = 248 and ox = 4.7958 (Round to four decimal places as needed.) (c) What is the probability that a random sample of 23 pregnancies has a mean gestation period of 240 days or less? The probability that the mean of a random sample of 23 pregnancies is less than 240 days is approximately 0.0475. 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 = 23 pregnancies were obtained from this population, we would expect 5 sample(s) to have a sample mean of 240 days or less. O B. If 100 independent random samples of size n = 23 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of 240 days or more. O C. If 100 independent random samples of size n = 23 pregnancies were obtained from this population, we would expect sample(s) to have a sample mean of exactly 240 days. (d) What is the probability that a random sample of 47 pregnancies has a mean gestation period of 240 days or less? The probability that the mean of a random sample of 47 pregnancies is less than 240 days is approximately (Round to four decimal places as needed.) Help me solve this View an example Get more help - Clear all Check answer me Course Home and . P Do Homework - Ch. 7:25 PM 2/8/2022