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Proving the equation
Suppose we define
(x_i-\mu_x)/(N-1))
How do I show that
?
where 
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Quote:
Originally Posted by
noob mathematician
Suppose we define
How do I show that
(\overline{x}-\mu_x)=(1-f)S_{xy}/n)
?
where

you can't
is a constant
while
is a rv
My guess is that you're mixing up population means (mu's) and sample means (x bar's)
or is that Expectation a sum?