We observe 32 nonconformities in inspecting 50 washing machines. The inspection unit is one ( = 1 ), and a common chart for nonconformities is to be used. a) What are the three-sigma control limits? b) Apply both normal and Poisson approximation to estimate the type I error. Which one is more logical? c) Apply both normal and Poisson approximation to estimate the type II error, if the average number of defects is actually 2.4 (c=2.4) Which one is more logical