(adsbygoogle = window.adsbygoogle || []).push({}); I have idea of physical signif of var(x),cov(x) but cant get derivations of equation.

Hi all,

I understood the facts that variance indicate the spread in random variable and covariance shows correlation between 2 r.v s etc. But I cannot imagine how we are arriving at their equations. Also what is the significance of nth moment etc?

TIA

-Devanand T

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# I have an idea of physical significance of var(x) , cov(x) but cant get equations.

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