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April 19, 2015

Homework Help: Stor

Posted by ami on Thursday, October 4, 2012 at 1:15pm.

Here is a simple way to create a random variable X that has mean μ and stan-
dard deviation σ: X takes only the two values μ−σ and μ+σ, eachwith probability
0.5. Use the definition of the mean and variance for discrete random
variables to show that X does have mean μ and standard deviation σ.

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