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May 4, 2015

Homework Help: math

Posted by Anonymous on Thursday, January 14, 2010 at 5:16pm.

20 students, a score of 10 indicates depression, a score of 0 indicates no depression, variation is unknown, but sample of 20 has a mean score of 4.4, unbiased estimate of population variance is 15. What is the variance of the distribution of means?

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