Which, if any, of these combinations of an X-bar chart and an S-chart suggest a problem? If there€™s a problem, did you find it in the X-bar chart, the S-chart, or both?

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(a) 950 900 850 800 750 350 300 250 Avg 753.05 200 150 100 UCL 320.22 UCL 888.32 Avg = 223.12 苗 650 LCL = 126.01 LCL 617.76 600 0 1 2 3 45 6 7 8 0 12 3 4 56 7 8 Group Group (b) 90o 850 500 450 400 350 300 UCL 87719 UCL = 382.42 750 700 650 600 Σ 550 500 450 Avg = 702.71 Avg = 25670 250 200 凸 150 LCL = 528.24 LCL = 130.97 100 0 1 2 3 4 5 6 7 8 9 10 Group 0 1 2 3 4 5 6 7 8 9 10 Group (c) 90o 850 800 750 E 700 400 ฐ 350 300 250 200 150 UCL 869.53 UCL 306.40 Avg = 72973 Avg = 205.67 650 600 550 LCL 104.94 LCL 589.94 50 0 1 2 3 4 5 6 7 8 9 10 Group 0 1 2 3 4 5 6 7 8 9 10 Group (d) 130 120 D 110 100 s 90 35 E 30 Δ 25 ち20 15 10 UCL 32.39 UCL = 100.52 Avg 18.87 Avg 82.11 80 70 60 LCL = 5.35 LCL 63.70 0 0 2 4 6 8 10 12 14 16 18 20 Group 2 4 6 8 10 12 14 16 18 20 Group