For a p-chart or c-chart, what is the implication of a negative value for the LCL?
A) A calculation error must have occurred.
B) The value of sigma must be reduced.
C) The process has too many errors.
D) The process is in a state of control.
E) The LCL can effectively be rounded up to 0.

Question

Quizplus · Accepted Answer

A negative LCL in a p-chart or c-chart indicates that the lower control limit is below zero, which is not possible for count data. Therefore, it is effectively rounded up to 0.

For a P-Chart or C-Chart, What Is the Implication of a Negative