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Mathematics 8 Online
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?

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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