McNemar’s test is used to test whether or not counts are consistent across two groups. It is often used to test if the counts between…

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A bar chartÂ uses rectangular bars to compare the values of different categories. The x-axis of the chart shows the category names and the y-axisÂ shows the…

A histogram is a type of chart that uses rectangular bars to represent frequencies. To generate a histogram for a given dataset, simply enter the…

For a one sample z-test, Cohen’s d is a measure of the effect size of the test. It is calculated by using the following formula:…

For a two-sample independent t-test, an effect size measures the magnitude of the difference between the two sample means. This calculator finds three different effect…

Bartlett’s test is used to test if samples are from populations with equal variances. Some statistical tests, like the One-Way ANOVA, assume that variances are…

The Friedman Test is the non-parametric alternative to the one-way ANOVA with repeated measures. It is used to test for differences between groups when the…

This calculator finds the multinomial probability for a given set of data. Simply enter the probability and frequency for up to 10 outcomes and then…

Covariance is a measure of how changes in one variable are associated with changes in a second variable. Specifically, covariance measures the degree to which…

Chebyshev’s Theorem: For any number k greater than 1, at least (1 – 1/k2) of the data values in any shaped distribution lie within k…