Which of the Following Statements Are Not Correct?
A) for a 3-Sigma

Multiple Choice

Which of the following statements are not correct?

A) For a 3-sigma $\bar { X }$
Chart, where the process mean $\mu$
And standard deviation $\sigma$
Are known, the probability that a point on the chart falls above the UCL is .013, as is the probability that the point falls below the LCL.
B) For a 3-sigma S chart, $P \left( S _ { i } > U C L \right) = P \left( S _ { i } < L C L \right) = .0013$
C) For a 3-sigma R chart, $P ( R_{i} > U C L ) = P ( R _{i} < L C L ) = .0013$
D) Only B and C are not correct.
E) Only A and C are not correct.