Suppose that the average number of Facebook friends users have is normally distributed with a mean of 142 and a standard deviation of about 57. Assume forty-six individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. What is the distribution of ¯xx¯? ¯xx¯ ~ N(.     ,      ) For the group of 46, find the probability that the average number of friends is more than 139. .           , is the assumption that the distribution is normal necessary? No or Yes Find the first quartile for the average number of Facebook friends. .

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.