Question 15 8 pts B5. Regarding to the hypothesis tests and control charts, pick

Question

Question 15 8 pts B5. Regarding to the hypothesis tests and control charts, pick all correct statements. The samples in control charting must be normally distributed for hypothesis testing to work correctly The combination use of X-bar and R charts aims to test if the process distribution stays the same or not R chart is used to test whether the process variation is the same as that in Phase I process. X-bar chart is a collection of t-tests. O Control charting is NOT related to hypothesis testing

Explanation / Answer

Pick all correct answers:

1. The samples in control charting must be normally distributed for hypothesis testing to work correctly.

2. The combination use of X-bar and R charts aims to test if the process distribution stays the same or not.

3. R Chart is used to test whether the process variation is the same as that in phase I process

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