PROBLEM 1 Find the upper and lower control limits for the pc

PROBLEM 1: Find the upper and lower control limits for the p-chart. When each sample is taken has 200 Units, and average proportion nonconfroming is 0.26.

Solution

PROBLEM 1: Find the upper and lower control limits for the p-chart. When each sample is taken has 200 Units, and average proportion nonconfroming is 0.26.

p=0.26

n=200

s=sqrt(p(1-p)/n) = sqrt(0.26*0.74/200) =0.031

LCL = 0.26 - 3*0.031 = 0.167

UCL = 0.26 + 3*0.031 = 0.353