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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?
 

cancer06

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Re: variance

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

m_llaa

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variance

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

rficd

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Re: variance

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

scintillatingstuffs

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Re: variance

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

arash_khbee

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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.
 

masri

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Re: variance

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

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