Answer Happy

At Quickie Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 400 seconds for the wash process. Suppose the average range for a sample of 10 cars is 9 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process. Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart. seconds and the LCLR equals seconds. (Enter your responses rounded to two decimal The UCLR equals places.) The UCL-, equals seconds and the LCL equals seconds. (Enter your responses rounded to two decimal places.) X
Factors for calculating three-sigma limits for the x-chart and R-chart Size of Sample (n) Factor for UCL and LCL for x-chart (A2) Factor for LCL for R-Chart (D3) Factor for UCL for R-Chart (DA) Ô ooo vou AWN 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0 0 0 0 0 3.267 2.575 2.282 2.115 2.004 1.924 1.864 1.816 0.076 0.136 0.184 10 0.308 0.223 1.777