VassarStats

An easy to use set of statistical tools for all of the researchers statistical needs. Includes a very wide assortment of tools and filled with rich explanations. Some of tools included are:

Analysis of Variance (ANOVA): One-way ANOVA, Two-way ANOVA, and additional variations depending on the Factors.

Utilities: such as calculators, randomizer, data transformations, converters, and more.

Clinical research calculators: A wide range of options here including prevalence, sensitivity, specificity, Kaplan-Meir survival, and more

Probabilities: Checking randomness, testing sequential sampling, and other options

Testing all the distributions: Such as Binomial, Poisson, Chi-squared, t-distributions, and the rest