Using the same data as in question 10,what is the lower control limit for a p-chart?
A).0750
B).0191
C).0000
D).0692

Question

Quizplus · Accepted Answer

The formula to calculate the lower control limit for a p-chart is:
LCL = p̂ – 3√((p̂(1-p̂))/n)
Where p̂ is the proportion of defectives, n is the sample size and √ is the square root. 
From the given data, we can calculate p̂=26/150 = 0.1733
Substituting the values in the above formula, we get LCL= 0.0191
Therefore, the correct choice is B.

Using the Same Data as in Question 10,what Is the Lower