This collection of statistical calculators allow users to input their own data to solve various problems or create graphs. Options include: Random Permutations; Two Sample Test; Correlation and...

This page calculates the expected number of deaths, the expected proportion of deaths at a given time, or the time at which a given proportion of deaths have occurred for a planned study. Users can...

This page calculates either sample size or power for one a one sample binomial problem. Users choose between a one-sided and two-sided test and specify the null and alternative hypothesized...

This page calculates either estimates of sample size or power for differences in proportions. The program allows for unequal sample size allocation between the two groups.

Visual ANOVA is a simple little program that puts the theory on ANOVA into a simple visual whole. It assumes that you've read the Even if your understanding is incomplete at this time, it is worth...

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