Significance of difference between two correlation?
To find the significance of a difference between two
correlations:
1. Convert each to Fisher's Zr using: .5*(ln(1+r)-ln(1-r)) or
just arctanh(r)
2. Use the equation: (Zr1 - Zr2)/sqrt((1/(n1-3))+(1/(n2-3))),
this will give you a Z
3. Look-up the Z on a table or from a calculator or in a
computer to get the p-value