You want to estimate the mean number of friends for all Facebook users. How many users must be in the sample if you want to be 95% confident that the sample mean is within seven friends of the population mean? Assume the standard deviation is 53.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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You want to estimate the mean number of friends for
all Facebook users. How many users must be in the
sample if you want to be 95% confident that the
sample mean is within seven friends of the population
mean? Assume the standard deviation is 53.
Transcribed Image Text:You want to estimate the mean number of friends for all Facebook users. How many users must be in the sample if you want to be 95% confident that the sample mean is within seven friends of the population mean? Assume the standard deviation is 53.
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