All these probable causes and assumptions are nothing but our hypothesis in simple language.īelow are the specific reasons why we perform hypothesis testing. Similarly, basis initial data analysis we identify certain trends and form assumptions. In the Measure Phase of a DMAIC project, we conduct brain storming exercises with subject matter experts and prepare a list of probable causes. And the first step of hypothesis testing is forming Null and Alternative hypothesis.īefore we move to write our null hypothesis, let us first understand the need of doing hypothesis testing. Hypothesis testing is the fundamental and the most important concept of statistics used in Six Sigma and data analysis. What is Null and Alternative hypothesis in statistics and how to write them, explained with simple and easy examples.
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