Question

In which stage of a Six Sigma DMAIC project are hypothesis tests most frequently used?

A. Define
B. Measure
C. Analyze
D. Improve
E. Control

Answer 1

In the Analyze stage of a Six Sigma DMAIC project, hypothesis tests are used to analyze the data collected, make decisions about the null hypothesis, and identify the root causes of process defects.

Step-by-step explanation:

Hypothesis tests are most frequently used during the Analyze stage of a Six Sigma DMAIC project. During this phase, you typically:

• State an appropriate null hypothesis and alternative hypothesis,
• Define the random variable,
• Calculate the test statistic,
• Calculate the p-value,
• Make a decision about the null hypothesis at a predefined level of significance, often 5%,
• Identify Type I and Type II errors associated with the decision.

This process is essential for analyzing the data collected to validate or invalidate the initial hypotheses and to identify the root causes of defects in a process.