Find 0.980 and 0.020 probability limits for a control chart for nonconformities per unit when u = 6.0 and n = 3.
u chart with u = 6.0 and n = 3. c = u n = 18. Find limits such that Pr{D UCL} = 0.980 and Pr{D < LCL} = 0.020.
Using the Poisson distribution to find Pr{D x | c = 18}