Question

A survey of 25 randomly selected customers found the following ages (in years):
The mean was 31.84 years and the standard deviation was 9.84 years.
a) What is the standard error of the mean?
b) How would the standard error change if the sample size had been 100 instead of 25? (Assume that the sample standard deviation didn’t change.)


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  • CreatedMay 15, 2015
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