Using
the Fisher rtoz transformation, this page will calculate a value of z that can be applied to assess the significance of the difference between
 r, the correlation observed within a sample of size n

and

 rho, the correlation hypothesized to exist within the population of bivariate values from which the sample is randomly drawn.

If
r is greater than
rho, the resulting value of z will have a positive sign; if
r is smaller than
rho, the sign of z will be negative.
To perform the calculation, enter the relevant values into the designated cells, then click the 'Calculate' button.
Observed
for Sample
 Hypothetical
for Population
 
 

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©Richard Lowry 2001
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