Dear Math-Crack,

I really (!!!) would appreciate you help in solving the following equating for "w":

r=w*7.8-i / (sqr(7.8²+i²-2*w*7.8*i))

Sqr stands for square root. "/" for division

This is a version of the equation for the so called "part whole correlation" in Statistics (r=part whole correlation).

I want to reverse the "part whole correltion". To do that I "simply" have to solve the equation for w but I did not succeed!

Any help would be appreciated!

sincerly,

M@ne