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 upper control limit be?
A)0.5941
B)0.6348
C)0.4452
D)0.5460
E)0.5340

Question

Quizplus · Accepted Answer

The formular for calculating the upper control limit in p-chart is:

UCL = p +3*sqrt((p*(1-p))/n)

where:
p = proportion of defectives in the population
n = sample size

Substitute the given values into the formula:

UCL = 0.54 + 3*sqrt((0.54*(1-0.54))/249)
UCL = 0.6348

Therefore, the upper control limit is 0.6348, which is option B.

A P Chart Is to Be Developed for Use in Quality