There are a number of online tools for calculating basic statistics. This Psychology.org site provides a long list of websites and links of tips, tools and blogs. Try this Free online tool Its modular design and sophisticated interface makes it very easy to use. It provides parametric (tTest, 1 way ANOVA, correlation, linear Regression,..) and nonpararmetric tests (chisquare, Wilcoxon, MannWhitney, Friedman, KruskalWallis,…), useful data handling functions and creates high resolution graphs…but you do need to register. StatTools is a collection of statistical programs that were used in clinical research and quality assurance. Lots of useful tools to explain and calculate many tests, both parametric and nonparametric from ttests up to anova, regression and meta analyses, although some terminology may be different from what you are used to.

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