Correlation Test
www.quantpsy.org › corrtest › corrtest2This interactive calculator yields the result of a test of the equality of two correlation coefficients obtained from the same sample, with the two correlations sharing one variable in common. The result is a z-score which may be compared in a 1-tailed or 2-tailed fashion to the unit normal distribution.
Two Correlation Coefficients - VassarStats
vassarstats.net/rdiff.htmlUsing 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, r a and r b, found in two independent samples.If r a is greater than r b, the resulting value of z will have a positive sign; if r a is smaller than r b, the sign of z will be negative.