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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...
This page will perform the procedure for up to k=12 sample values of r, with a minimum of k=2. It will also perform a chisquare test for the homogeneity of the k values of r, with df=k1. The several values of r can be...
This page will calculate the 0.95 and 0.99 confidence intervals for rho, based on the Fisher rtoz transformation. To perform the calculations, enter the values of r and n in the designated places, then click the...
This page will calculate the lower and upper limits of the 95% confidence interval for the difference between two independent proportions, according to two methods described by Robert Newcombe, both derived from a...
In this applet, A and B are subsets of a universal set S. The list is given of the 16 different subsets of S that can be constructed from A and B using the basic set operations of union, intersection, and complement....

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