A p chart is to be developed for use in quality control.The value of p is calculated to be 0.54.The sample size is 249.What would the lower control limit be?
A)0.5941
B)-0.6348
C)0.4452
D)-0.5460
E)0.5340

Question

Quizplus · Accepted Answer

The formula for calculating the lower control limit for a p chart is:
Lower Control Limit = p - 3 * sqrt((p*(1-p))/n)
Plugging in the given values, we get:
Lower Control Limit = 0.54 - 3 * sqrt((0.54*(1-0.54))/249)
                     = 0.4452
Therefore, the answer is C.

A P Chart Is to Be Developed for Use in Quality