estimate E[X/Y] using taylor series approximation http://www.stat.cmu.edu/~hseltman/files/ratio.pdf
1 | ratio.mean.est(ex, ey, e2y, e3y, cxy, vy)
|
ex |
E[X] |
ey |
E[Y] |
e2y |
E^2[Y] |
e3y |
E^3[Y] |
cxy |
Cov[X,Y] |
vy |
V[Y] |
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