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 YesFind the first quartile for the average number of Facebook friends. .

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Answered: Suppose that the average number of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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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