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9. [-16 Points] DETAILS ASWSBE14 21.E.007. MY NOTES ASK YOUR TEACH DATAfile: Tires You may need to use this table to answer this question. The Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road conditions. To study and control the manufacturing process, 20 samples, each containing three radial tires, were chosen from different shifts over several days of operation, with the following results. Tread wear measurements are in hundredths of an inch. Sample Tread Wear 1 31 42 28 2 26 18 35 3 25 30 34 4 17 25 21 5 38 29 35 6 41 42 36 7 21 17 29 8 32 26 28 9 41 34 33 10 29 17 30 11 26 31 40 12 23 19 25 13 17 24 32 14 43 35 17 15 18 25 29 16 30 42 31 17 28 36 32 18 40 29 31 19 18 29 28 20 22 34 26 Assuming that these data were collected when the manufacturing process was believed to be operating in control, develop the R chart. Compute the upper and lower control limits for the R chart. (Round your answers to two decimal places.) UCL = LCL =

Construct the R chart. 35 35 UCL 35 30 25 35+ 30 30 30 25 UCL UCL Sample Range ག་ Sample Range 15 10 UCL Sample Range Atte Sample Range LCL 5 LCL LCL 0 LCL 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 Sample Number Sample Number Sample Number Sample Number Assuming that these data were collected when the manufacturing process was believed to be operating in control, develop the x chart. Compute the upper and lower control limits for the x chart. (Round your answers to two decimal places.) UCL = LCL = Construct the x chart. 50 50 50+ 45 UCL 45 45 50 45 40 35 UCL UCL 40 UCL Sample Mean x 30 w Sample Mean Sample Mean WA Sample Mean LCL LCL 15 15 15 LCL 15 LCL 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 2 4 6 8 10 12 14 16 18 20 Sample Number Sample Number Sample Number Sample Number