a random variable X has the following pmf:
X
-1
0
1
P[X]
0.25
0.5
Define Y = X2 & W= Y+2.
Which one of the following statements is nottrue?
V[Y] = 0.25.
E[XY] = 0.
E[X3] = 0.
E[X+2] = 2.
E[Y+2] = 2.5.
E[W+2] = 4.5.
V[X+2] = 0.5.
V[W+2] = 0.25.
P[W=1] = 0.5
X and W are not independent.
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