Non-Parametric Mann Whitney U Test Calculator
Introduction & Importance
The Non-Parametric Mann Whitney U Test is a statistical test used to compare the means of two independent groups. It’s particularly useful when the data is not normally distributed or when the sample size is small. This calculator helps you perform this test with ease.
How to Use This Calculator
- Enter the means of the two groups in the input fields.
- Click the ‘Calculate’ button.
- View the results below the calculator.
Formula & Methodology
The Mann Whitney U Test is based on the rank sum method. The test statistic U is calculated as follows…
Real-World Examples
Let’s consider three scenarios where this test can be applied…
Data & Statistics
| Group | Mean | Standard Deviation |
|---|---|---|
| Control | 5.2 | 1.3 |
| Treatment | 6.5 | 1.8 |
Expert Tips
- Always check the assumptions of the test before using it.
- Consider the effect size, not just the p-value, when interpreting results.
Interactive FAQ
What are the assumptions of the Mann Whitney U Test?
The test assumes that the two samples are independent and that the data is at least ordinal.
What does the p-value tell me?
The p-value tells you the probability of observing the test statistic, or a more extreme value, if the null hypothesis is true.