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Re: expectated value
Posted:
Jan 15, 2013 9:44 PM


On 01/15/2013 12:47 PM, maryam wrote:
>  > Dear Torsten > thanks your reply > In the part of my thesis I obtain a vector of random variables that is > I=1xn  matrix. > then I must to calculate "contrast (I)" , the definition of contrast is >contrast(x)=E(x^2)/(E(x))^2 > and E(.) denoted the expectation operator. > how could I calculate contrast (I)? > thank you very much >
From what probability distribution are those numbers drawn from?
Nasser



