1. From Chapter 5 a survey of 25 randomly selected customers found the following ages (in years):...
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1. From Chapter 5 a survey of 25 randomly selected customers found the following ages (in years):
Recall that 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 same size had been 100 instead of 25? (Assume that the sample standard deviation didn’t change.)
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Related Book For 
Business Statistics
ISBN: 9780321716095
2nd Edition
Authors: Norean D. Sharpe, Paul F. Velleman, David Bock, Norean Radke Sharpe
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