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September 14, 2014

Homework Help: math

Posted by jake on Thursday, April 9, 2009 at 5:58pm.

Suppose x is a random variable with mean and standard deviation. If a large number of trials is observed, at least what percentage of these values is expected to lie beween mean-2(standard deviation) and mean + 2(standard deviation)

could someone help me i'm so lost? thank you sooooo much!!!

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