Suppose that the average number of Facebook friends users have is normally distributed with a mean of 15 and a standard deviation of about 58. Assume forty-eight individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of ? N 150 ✓58 b. For the group of 48, find the probability that the average number of friends is more than 147. c. Find the first quartile for the average number of Facebook friends. d. For part b), is the assumption that the distribution is normal necessary? Yes No o

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