Expectation - StudentOfFortune.com

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Asked by:

doreen
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Questions Asked: 4
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$10.00 Expectation

From Mathematics: Statistics
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Due on Nov. 25, 2008
Asked on Nov. 22, 2008 at 06:54:09AM

Q:
1. prove that expection of a constant is a constant ie Ea=a, a is a constant
2. If X>Y prove EX>EY

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bogdan asked: are the random variables discrete or continuous?
To which doreen said: discrete. But i got he answer to one question I only need the answer to prove If X>=Y then EX>=EY.

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Posted by:

sudipta

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$10.00 Both parts answered

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Posted on Nov. 22, 2008 at 07:07:29AM

A:
Preview: ... 1 = a 2. Suppose the random variable X > the random variable Y, such that: X = Y + ...

The full tutorial is about 108 words long .

Posted by:

shri21

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$8.00 Problems on Mathematical Expectation of a variable

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Posted on Nov. 22, 2008 at 07:37:41AM

A:
Preview: ... er [-infinity, infinity] = c * 1 = c [Because, Integral {f(x)}dx over [-infinity, inf ...

The full tutorial is about 97 words long .

Posted by:

bogdan
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$7.90 proof

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Posted on Nov 22, 2008 at 7:15:34PM

A:
Preview: ... variable. Then the epected value of X is: EX= sum x*p(x) 1) If X=a is a constant, then P(X=a)=1, so EX=a*1=1 2)Monotonicity. Let X,Y be two d ...

The full tutorial is about 104 words long .