Date: Jan 15, 2013 9:44 PM
Author: Nasser Abbasi
Subject: Re: expectated value
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