This Chi-square calculator finds the chi-square critical value and corresponding p-value for a contingency table that has up to five rows and five columns. Simply…

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The one-way repeated measures ANOVA calculator compares the means of three or more samples in which each subject shows up in each sample. Simply enter…

The one-way ANOVA calculator compares the means of three or more independent samples. Simply enter the values for up to five samples into the cells…

What is a Mann-Whitney U Test? A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two independent…

A Mann-Whitney U test is used to compare the differences between two independent samples when the sample distributions are not normally distributed and the sample…

The following tables provide critical values for two tailed Mann-Whitney U tests for various levels of alpha. For one-tailed tests, simply double the value of…

Conducting a Simple Linear Regression Suppose we have the following dataset that shows the square feet and price of 12 different houses: We want to…

Confidence Level (%) Population Variance (σ2) Margin of Error (%) Sample size needed: 468 Sample size = (Z2 * σ2) / e2

This lesson explains how to conduct a hypothesis test for a difference between two population means where each observation in one sample can be paired…

What is Simple Linear Regression? Simple linear regression is a statistical method you can use to understand the relationship between two variables, x and y.…