- #1
joemama69
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Homework Statement
We are given the following table and need to find the E(XY)
X|Y y = 17 20 23 35 48 p(x)
x = -20 0.02 0.03 0.07 0.02 0.06 0.2
0 0 0.05 0 0.05 0.1 0.2
1 0.05 0.03 0.02 0.07 0.03 0.2
3 0.01 0.02 0.03 0 0.04 0.1
17 0.18 0.04 0.06 0.01 0.01 0.3
p(y) 0.26 0.17 0.18 0.15 0.24 1
Homework Equations
The Attempt at a Solution
So it is clear to me that X & Y are dependent..
E(XY)=SUM_x SUM_y (xyp(x,y)) = -20(17)(.02)+(-20)(20)(.03)... and so on n so forth... is this correct?