Utah Lean Six Sigma Training Center

Hypothesis Testing Tool

Choose the question you are trying to answer, enter your data, and get the appropriate test, result, and plain-language interpretation.

1. Choose the test

What kind of outcome are you analyzing?
Continuous
Pass / Fail
Categories
How many groups or conditions?
One
Two
3+
For two groups, are the observations paired?
No
Yes

Ready for analysis

Use the guided selector on the left. The tool will select the statistical test and explain the result.
No test run

Hypothesis testing in one sentence

Ask whether the difference you observed is large enough that random sampling variation is an unlikely explanation.
Statistical significance is not the same thing as practical importance. A very small effect can be statistically significant with enough data.
Educational use: ULSS Hypothesis Testing Tool. It is not a substitute for a validated statistical package when regulatory, contractual, safety-critical, or high-consequence decisions require formally validated software.