Using the same data as in question 10,what is the lower control limit for a p-chart (rounded to 4 decimals)?
A).0750
B).0191
C).0000
D).0692

Question

Quizplus · Accepted Answer

For a p-chart, the lower control limit is calculated as LCL = p-bar - 3*sqrt (p-bar*(1-p-bar)/n), where p-bar is the overall proportion of defectives and n is the sample size. Plugging in the given values, we get:
p-bar = (18+17+14+13+15)/(2000*5) = 0.00155
LCL = 0.00155 - 3*sqrt (0.00155*(1-0.00155)/(2000*5)) = 0.0191
Therefore, the correct choice is B.

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