Suppose that the number of Facebook friends users have is normally distributed with a mean of 125 and a standard deviation of about 46. Assume ten 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 10, find the probability that the average number of friends is less than 145. Find the third quartile for the average number of Facebook friends. Round to 2 decimal places. For part b), is the assumption that the distribution is normal necessary? YesNo

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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 number of Facebook friends users have is normally distributed with a mean of 125 and a standard deviation of about 46. Assume ten 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 10, find the probability that the average number of friends is less than 145.
Find the third quartile for the average number of Facebook friends. Round to 2 decimal places.
For part b), is the assumption that the distribution is normal necessary? YesNo

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