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OpenStudy (anonymous):
Samples of size n = 250 are randomly selected from the U.S. census data, and the median income is found for each sample. What is the distribution of the sample medians?
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OpenStudy (tkhunny):
250 is a large enough sample, I would thing. The standard deviation of the Sample Median, then, is about 25% greater than the standard deviation of the Sample Mean. 1.253 is the official factor.
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