MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Suppose that the average number of Facebook friends that users have is normally distributed with a
mean of 112 and a standard deviation of about 41.
Assume nine individuals are randomly chosen.
Round all answers to 4 decimal places if necessary.
a. What is the distribution of a?
x ~ N( 112
V 13.666
b. For the group of 9, find the probability that the average number of friends is less than 100.
0.1900 V
c. Find the first quartile for the average number of Facebook friends.
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Transcribed Image Text:Suppose that the average number of Facebook friends that users have is normally distributed with a mean of 112 and a standard deviation of about 41. Assume nine individuals are randomly chosen. Round all answers to 4 decimal places if necessary. a. What is the distribution of a? x ~ N( 112 V 13.666 b. For the group of 9, find the probability that the average number of friends is less than 100. 0.1900 V c. Find the first quartile for the average number of Facebook friends.
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