Which of the Following Statements Are Not True?
A) One $( 3 \sigma/ \sqrt { n } )$

Multiple Choice

Which of the following statements are not true?

A) One important use of control charts is to see whether some measure of location of the variable's distribution remains stable over time.
B) It is highly unlikely that for an in-control process, the sample mean will fall within 3 standard deviations $( 3 \sigma/ \sqrt { n } )$
Of the process mean $\mu .$
C) The use of control charts based on 3 standard deviation limits is traditional, but tradition is certainly not inviolable.
D) All of the above statements are true.
E) None of the above statements are true.