Which of the Following Statements Are True?
A) It Is $\bar { X }$

question 72

Multiple Choice

Which of the following statements are true?

• A) It is important to ensure that a process is under control with respect to location (equivalently, central tendency) as well as variation.
• B) Most practitioners recommend that control of a process be established on variation prior to constructing an \(\bar { X }\)
• Chart or any other chart for controlling location.
• C) Charts for variation are based on the sample standard deviation S and also based on the sample range R.
• D) Charts for variation that are based on the sample standard deviation S are generally preferred over charts that are based on the sample range R because the standard deviation gives a more efficient assessment of variation than does the range.
• E) All of the above statements are true.