p chart will be used as proportion of defective needs to be computed
p = Total number of defectives/Total number of observations = 29/(10*100) = 0.029
standard deviation = sqrt(p*(1-p)/n)
n = 100
standard deviation (s) = sqrt(0.029*(1-0.029(/100) = 0.017
z = 3
UCL = p + z*s = 0.029 + 3*0.017 = 0.08
LCL = p – z*s = 0.029 – 3*0.017 = -0.022. As it cannot be negative, it is 0
The process is under control as number of defectives in each sample has range from 0 to 0.08*100 , which is 0 to 8.
All samples have defectives within range
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