McNemar’s Test Calculator

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…

Bar Charts in R

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…

Histogram Generator

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…

Effect Size Calculator for One Sample Z-Test

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:…

Effect Size Calculator for T-Test

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 Calculator

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…

Friedman Test Calculator

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…

Multinomial Distribution Calculator

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 Calculator

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 Calculator

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…