From the course: Six Sigma: Green Belt
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Hypothesis testing basics
- At the beginning of the analyze phase, the project team generates theories on the potential causes or access that impact why? Brainstorming is used, and these theories are organized and displayed using a cause-effect or fishbone diagram. If you're not familiar with cause-effect diagrams, I recommend reviewing Six Sigma fundamentals. Using the collective knowledge and experience of the project team, subject matter experts and the various stakeholders, the most likely theories are selected from the cause-effect diagram. Then, the selected theories will be tested to determine the causes or key axes that impact why? We use a data driven method called hypothesis testing. Hypothesis testing is often referred to as the scientific method. A theory or hypothesis is proposed and data is used to run a statistical test to prove or disprove that theory. Hypothesis testing is set up as a pair of statements and null hypothesis and…
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