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17 July, 23:39

A discrete random variable has a mean of 400 and a variance of 64. what is the standard deviation?

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  1. 17 July, 23:46
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    Given that a random variable has a mean of 400 and variance of 64, the standard deviation will be:

    s. d=sqrt (variance)

    =sqrt (64)

    =8

    therefore the variance is 8
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