For the random variable:
P(Y=0)= 1/8, P(Y=1)=1/2, P(Y=3)=3/8
Find the MGF of Y, and E[Y] and Var(Y).
Helpppp, I reallly don't have a clue how to do this!
μ = E(X) = x1.P(X = x1) + x2.P(X = x2) + . . . + xn.P(X = xn) = ∑ (xi.P(X = xi))If X is a random variable, its variance is defined to be
σ2 = E( [X - μ]2 ). Its standard deviation is defined to be the square root σ of the variance.
replace X by Y ...
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Edit: Asked here: http://www.mathhelpforum.com/math-he...ution-mgf.html. Thread closed.