Suppose that the average number of Facebook friends users have is normally distributed with a mean of 141 and a standard deviation of about 53. Assume forty 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 thegroup of 40, find the probability that the average number of friends is less than 128. ________Find the first quartile for the average number of Facebook friends. For part b), is the assumption that the distribution is normal necessary? Yes/No

Given Mean(μ)=141standard deviation(σ)=53sample size(n)=40

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 141 and a standard deviation of about 53. Assume forty 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 thegroup of 40, find the probability that the average number of friends is less than 128. ________
Find the first quartile for the average number of Facebook friends.
For part b), is the assumption that the distribution is normal necessary? Yes/No

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