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What does the variance mean for the RV?

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saeddawoud

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what does the variance mean for the RV? the mean?
 

Re: variance

Variance is the average deviation of the RV from its mean value. It shows the spread.
 

variance

Hi
It also means the ac power of the RV in communications.
 

Re: variance

maybe the autocorelation is corresponding to power. or the second order moment about origin is corresponding to power.
 

Re: variance

variance as the name indicates is the variation from a mean... how the signal changes abt a mean...
 

Re: variance

hi
variance indicates the amount of the spreading of RV in vicinty of its mean value.
you can find more inforamtion about it in probability books.
 

Re: variance

variance is the ac power of the signal and the root of it gives thestd deviation
 

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