HEATKEYS

Web site for statistical computation; probability; linear correlation and regression; chi-square; t-procedures; t-tests; analysis of variance; ANOVA; analysis of covariance; ANCOVA; parametric; nonparametric; binomial; normal distribution; Poisson di...

MedCalc statistical software for biomedical research, including ROC curve analysis, method comparison and quality control tools. Free trial available.

Step-by-step SPSS tutorials with screenshots explaining how to perfrom basic, intermediate and advanced statistical tests in SPSS as well as comprehensive statistical guides.

Statistical resources for social scientists, including Z-test, Chi-square & T-test statistical calculators.

An R introduction to statistics that explains basic R concepts and illustrates with statistics textbook homework exercises.

GraphPad Prism is a powerful combination of biostatistics, curve fitting (nonlinear regression) and scientific graphing in one comprehensive program. Easily organize, analyze and graph repeated experiments; pick appropriate statistical tests and inte...

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...