These pages from the University of Melbourne explain statistical concepts using various examples from medicine, science, sports, and finance. The intent is not computational skill but conceptual understanding. Some...

Beginning with a set of n paired values of Xa and Xb, this page will perform the necessary rank- ordering along with all other steps appropriate to the Wilcoxon test. As the page opens, you will be prompted to enter the...

This calculator, created by authors Leon Avery and Ivo Dinov of the University of California, Berkeley, determines the level of significance for the Wilcoxon-Mann-Whitney U-statistic. Users can enter N1, N2, and U or...

Richard Lowry of Vassar College has created this java script which calculates the areas under the curve of the normal distribution falling to the left of -z, to the right of +z, and between -€”z and +z. This page is very...

This slide show presentation, created by William Richards of The Vancouver Network Analysis Team, provides two good examples on using the Z-test for the difference between two means. Gives some good "plain language"...