Question: b. On the control charts developed in part (a), plot the values from samples 16 through 25 and comment on whether the process is in

b. On the control charts developed in part (a), plot the values from samples 16 through 25 and comment on whether the process is in control. Choose the correct R-chart for the data below. OA OB OC. OD 20 UCLR 20 UCER UCLR 15 a Range Range 16 12 8- 4 M 28 UCLR 24 20 16- 12 Range OS 12 8- 4 LCLR 0 15 17 19 21 23 25 Sample Number LCLR LCLR 15 17 19 21 23 25 Sample Number 15 17 19 21 23 25 Sample Number LCLR 0+ 15 17 19 21 23 25 Sample Number The Money Pit Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen samples of five completed mortgage transactions each were taken during a period when the process was believed to be in control. The times to complete the transactions were measured. The means and ranges of the mortgage process transaction times, measured in days, are as follows: 15 5 15 11 6 17 7 18 14 11 19 19 17 10 17 12 16 12 12 8 14 11 14 12 13 12 1 M2H 23 24 25 21 22 22 16 14 17 12 18 20 Sample 1 2 3 4 8 12 13 Mean 20 17 11 20 15 Range 9 13 6 10 15 15 Subsequently, samples of size 5 were taken from the process every week for the next 10 weeks. The times were measured and the following results obtained: Sample 16 17 18 19 20 Mean 25 23 21 Range B 13 8 6 14 17 13 12 10 8 Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart a. Construct the control charts for the mean and the range, using the original 15 samples. Set up the R-chart by specifying the center line and three-sigma control limits below. (Enter your responses rounded to two decimal places.) R-chart UCLR - 25.09 R - 11.87 LCLR 0 Incor Factors for calculating three-sigma limits for the x-chart and R-chart Factor for LCL for R-Chart (D3) Size of Sample Factor for UCL and LCL for x-chart (A2) 2 1.880 3 1.023 4 0.729 5 0.577 6 0.483 0.419 8 0.373 9 0.337 10 0.308 0 0 0 0 0 0.076 0.136 0.184 0.223 Factor for UCL for R-Chart (D4) 3.267 2.575 2.282 2.115 2.004 1.924 1.864 1.816 1.777 Set up the X-chart by specifying the center line and three-sigma control limits below. (Enter your responses rounded to two decimal places.) x-chart UCL 22.97 16.13 LCL 9.29

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