Solution for QID #110442: A visual inspection for scratches (each unit is judged good | StudyHelpMe

A visual inspection for scratches (each unit is judged good or bad) on a decorative paint trim produced the following data for the last week. For each sample, 30 units were inspected 2 Sample Defectives This week 30 pcs were again inspected on each of two occasion and on Monday 6 pieces were found defective in the first sample and on Tuesday nine were found defective in the second sample. Comment on the process by developing a suitable chart with standard deviation equalling 2. Ans: p- Chart: a. CL = 0.16, UCL = 0.294, LCL = 0.026 b. CL = 0.25, UCL = 0.408, LCL = 0.092