Problem 1 Samples are taken from the production of a factory making computer chips. Table below gives the sample size and the number of nonconforming computer chips for each sample: Sample Items Nonconforming Sample Items Nonconforming Sample Items Nonconforming No. Inspected Items No. Inspected Items No. Inspected Items 1 200 12 9 90 6 17 100 5 2 150 8 10 160 18 160 12 3 210 6 11 150 10 19 110 8 190 4 12 140 8 20 200 14 160 9 13 150 5 21 160 10 6 100 8 14 60 4 22 90 4 100 12 15 120 6 23 230 3 8 90 7 16 80 3 24 160 5 (a) Construct a p-chart by setting up the exact control limits or each sample. Are there any samples out of control? (b) If there are any samples out of control, assuming special causes, revise the centerline and the contol limits