marginal distribution of y------
Y | 1 | 2 | 3 |
P(Y=y) | 1/6+1/6 | 1/6+0 | 1/4+1/4 |
P(Y=y) | 1/3 | 1/6 | 1/2 |
E(XY) = ΣXY*P(x=x,Y=y)
X | Y | P(X=x,Y=y) | X*Y*P |
0 | 1 | 1/6 | 0 |
0 | 2 | 1/6 | 0 |
0 | 3 | 1/4 | 0 |
1 | 1 | 1/6 | 1/6 |
1 | 2 | 0 | 0 |
1 | 3 | 1/4 | 3/4 |
total | 11/12 |
so, E(XY) = 11/12 =0.92
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for this question , Y=2x+1, find the pmf of y ,E(y) and var(y)
please define X
Y=2x+1, find the pmf of y ,E(y) and var(y) Zhejiang University of Science and Technology 2....
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