STATISTICS HW #1

[Sha9292]

Suppose that the average number of Facebook friends users have is normally distributed with a mean of 136 and a standard deviation of about 43. Assume thirteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible.


a) For the group of 13, find the probability that the average number of friends is more than 128.
b) Find the first quartile for the average number of Facebook friends

 

[Deleted member 4993]

Suppose that the average number of Facebook friends users have is normally distributed with a mean of 136 and a standard deviation of about 43. Assume thirteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible.
a) For the group of 13, find the probability that the average number of friends is more than 128.
b) Find the first quartile for the average number of Facebook friends

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[Dr.Peterson]

This is a question about the distribution of sample means. What have you learned about that topic?