Which of these is a correct expression for the UCL of the modified control charts when the type I error is not specified
Posted: Thu Jul 14, 2022 1:58 pm
a) \(UCL=USL+\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \)
b) \(UCL=USL+\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \)
c) \(UCL=USL-\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \)
d) \(UCL=USL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \)
b) \(UCL=USL+\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \)
c) \(UCL=USL-\left(Z_δ-\frac{3}{\sqrt{n}}\right) \sigma \)
d) \(UCL=USL-\left(Z_δ+\frac{3}{\sqrt{n}}\right) \sigma \)