How does variability compare in distributions based on individual scores

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How does variability compare in distributions based on individual scores and distributions based on sample means?
Feb 23rd, 2015

variablity based on sample means will reduce.

Standard deviation of sample means ( or standard error) = sigma/sqrt(n).

If the sample size is large, then the standard deviation will be very small

Feb 23rd, 2015

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Feb 23rd, 2015
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Feb 23rd, 2015
Jun 24th, 2017
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