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Posted by on Tuesday, September 11, 2007 at 4:26pm.

Sample Size, Variance and Standard Deviation
A student organization plans to ask 100 randomly selected students how much they spent
on textbooks last semester. You argue for a sample of 900 students instead of 100. You
know the standard deviation of the sample mean x of the amounts spent will differ. How
will the standard deviation of the larger sample compare with that of the smaller sample?

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