Significance of the Difference Between Two Correlation Coefficients
Using the Fisher r-to-z transformation, this page will calculate a value of z that can be applied to assess the significance of the difference between two correlation coefficients, ra and rb, found in two independent samples. If ra is greater than rb, the resulting value of z will have a positive sign; if ra is smaller than rb, the sign of z will be negative.

To perform the calculation, enter the respective values of r and n for the two samples into the designated cells, then click the «Calculate» button.

Sample A Sample B
ra =
 na =
rb =
 nb =
z =
  P   one-tailed

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