VAR

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March 7, 2017 at 8:49 am #376191
mansoor
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in some circumstances, instead of using the given mean in the question we have to use

z=(x-mean)/sigma

can u please tell under which circumstances do we use this rather than the mean given?

thank u!!
March 7, 2017 at 1:41 pm #376247
John Moffat
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I don’t know what you mean by writing ‘instead of using the given mean’. The tables always give the probability of being between the mean and some other value.
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