Answer Happy

The Money Ft 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: Subsequently samples o Sample Mean Range Set up the chart by O 12 3 40 5 6 7 1 9 10 11 12 13 14 15 20 17 11 20 15 15 18 10 16 17 18 12 14 12 15 913 610 11 16 14 17 12 12 12 11 13 15 from the process every week for the next 10 weeks. The times were measured and the following results obtained 9 Sample Mean Range Click the icon to view the table of factors for calculating three-sigma limits for the chart and Richart Construct the control charts for the mean and the range, using the original 15 samples Set up the R-chart by specifying the center the and three signa control limits below Enter your responses rounded to two decimal places) 16 17 18 14 17 12 A 13 B 19 20 21 18 20 22 6 14 16 UC 2525 A-11.00 LO Rehart UCL control limits below Enter your responses rounded to two decinal places) -chart LOL 22 23 24 25 10 25 23 21 13 12 10
tir e Reference Size of Sample Factor for UCL and LCL for x-chart (A₂) (n) 2 3 4 5 6 8 Factors for calculating three-sigma limits for the x-chart and R-chart Factor for LCL for R-Chart (D₂) 9 10 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 Print 0 0 0 0 0 0.076 0.136 0.184 0.223 Done 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 I X