# Chi-Square Calculator (Contingency Table)

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…

# One-Way Repeated Measures ANOVA Calculator

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…

# One-Way ANOVA Calculator

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…

# Mann-Whitney U Test

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…

# Mann-Whitney U Test Calculator

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…

# Mann-Whitney U Table

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…

# Testing the Significance of a Regression Slope

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…

# Sample Size Calculator to Estimate Population Mean

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

# Hypothesis Testing for a Difference in Paired Means

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…

# Introduction to Simple Linear Regression

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.…