cture.com/courses/33765/assignments/981070?return_to=https%3A%2F%2Fegcc.instructure.com%2Fcalendar%23view_name%3Dagenda Chapter 7 Test 1h Score: 6.72/10 5/10 answered Question 8 Score on last try: 0.4 of 1 pts. See Details for more. > Next question You can retry this question below Suppose that the average number of Facebook friends users have is normally distributed with a mean of 135 and a standard deviation of about 57. Assume fifteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of a? x ~ N( 135 b. For the group of 15, find the probability that the average number of friends is less than 140. c. Find the third quartile for the average number of Facebook friends. d. For part b), is the assumption that the distribution is normal necessary? O No Yes of Submit