Suppose that the average number of Facebook friends users have is normally distributed with a mean of and a standard deviation of about 49. Assume forty-five individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of ? a N( 128 7.3045 b. For the group of 45, find the probability that the average number of friends is less than 134. 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 NoO Yes

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Answer B C and D 

Suppose that the average number of Facebook friends users have is normally distributed with a mean of
and a standard deviation of about 49. Assume forty-five individuals are randomly chosen. Answer the
following questions. Round all answers to 4 decimal places where possible.
a. What is the distribution of ? a N( 128
7.3045
b. For the group of 45, find the probability that the average number of friends is less than 134.
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 NoO Yes
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Suppose that the average number of Facebook friends users have is normally distributed with a mean of and a standard deviation of about 49. Assume forty-five individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of ? a N( 128 7.3045 b. For the group of 45, find the probability that the average number of friends is less than 134. 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 NoO Yes

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