a. What is the distribution of x? a N( 111 42 b. For the group of 7, find the probability that the average number of friends is less than 96. c. Find the third quartile for the average number of Facebook friends.

a. What is the distribution of x? a N( 111 42 b. For the group of 7, find the probability that the average number of friends is less than 96. c. Find the third quartile for the average number of Facebook friends.

Name: Suppose that the average number of Facebook friends users have is nor
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Description: Suppose that the average number of Facebook friends users have is normally distributed with a mean of 111and a standard deviation of about 42. Assume seven individuals are randomly chosen. Answer the followingquestions. Round all answers to 4 decima

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Concept explainers

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.

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Question

Suppose that the average number of Facebook friends users have is normally distributed with a mean of 111
and a standard deviation of about 42. Assume seven individuals are randomly chosen. Answer the following
questions. Round all answers to 4 decimal places where possible.
a. What is the distribution of ? ¤ - N( 111
42
b. For the group of 7, find the probability that the average number of friends is less than 96.
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
Hint:
Some Helpful Videos:
Finding the Sampling Distribution [+]
Finding a Probability Using the Central Limit Theorem [+]
Finding Value Given a Probability Using the Central Limit Theorem [+1
• The Central Limit Theorem For Sums 2 [+]
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