Hypothesis Testing Cheat Sheet

In this article, we give you a Hypothesis Testing Cheat Sheet for understanding the Null HypothesisA statistical hypothesis is a hypothesis that is testabl... Learn More... and the Alternative HypothesisIn statistical hypothesis testing, the alternative hypothe... Learn More... of the key hypothesis tests in our Lean Six Sigma Green BeltSix Sigma trained key contributor and team leader, a part-ti... and Lean Six Sigma Black BeltExperienced, recognized Six Sigma expert and project leader,... courses.

You can use hypothesis tests to challenge whether some claim about a population is proven to be statistically true (meaning that the data proves that the claim through data). For example, a claim that “site A” in a financial company closes loans faster than “site B”. Another example may be that “shift 1” is performing better than “shift 2”.

I can’t tell you how many times I have sat in management meetings where I have heard leaders asking “why one department was performing better than another” because they could visually see a difference between the two departments. But, when we compared the data from the two departments in a hypothesis test we discovered that there was no statistically significant difference between the two departments. I have seen people fired for a perceived visual difference when there was no statistically significant difference.

Hypothesis testing is a formal statistical technique to decide objectively whether there is a significant statistical difference.

This article is a  Hypothesis Testing Cheat Sheet” for those in our Lean Six Sigma Green Belt and Lean Six Sigma Green Belt and Black Belt courses to quickly identify the Null Hypothesis and the Alternative Hypothesis for each Hypothesis Test.Black Belt courses to quickly identify the Null Hypothesis and the Alternative Hypothesis for each Hypothesis Test.

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