A survey of 25 randomly selected customers found the following ages (in years): The mean was 31.84
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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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a The standard eror SE s n 984 25 1968 years b If th...View the full answer
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Related Book For 
Business Statistics
ISBN: 9780321925831
3rd Edition
Authors: Norean Sharpe, Richard Veaux, Paul Velleman
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