Problem 10-3 (Static) The time in minutes to replace vehicle wiper blades at a service center was monitored using a mean and a range chart. Six samples of n = 20 observations were obtained and the sample means and ranges were computed: Sample Mean Range Sample Mean Range 1 3.06 . 42 3.13 26 2 3.15 50 $ 46 3 3.13 141 6 3.09 .45 3.06 Click here for the Excel Data File Factors for three-sigma controllimits for and R charts Number of Observations in Subgroup TACTORS FOR R CHARTS Lower Upper Control Control Linit. Limit, od 0 3:22 2.52 0 2.28 0 2.22 0 2.00 0.00 1.92 0.14 2.36 0.10 2.82 0.22 1.28 0.26 1.94 0.26 1.72 0.31 1.6 0.33 1.62 0.35 1.68 6.36 1.6 0.30 1.62 0.39 1.6 0.40 1.60 0.01 1.39 Factor for 1 chart, Az 1.88 1.02 0.73 0.58 0.48 0.42 0.37 0.34 0.33 0.29 0.27 0.25 0.24 0.22 0.21 0.20 0.1 0.1% 0.1 9 10 11 12 13 16 15 26 17 28 19 a. Using the factors in the above table, determine upper and lower limits for men and range charts. (Do not round Intermediate calculations. Round your mean value to 3 decimal places and range value to 4 decimal places.) Upper informean Lowrimo Upper for range Lower for range a1. Is the process in control? The process is in control The process is not in control D. The time in minutes needed to assemble security cameras at a production facility was recorded for eight samoies of 15 observations each and mears and ranges were computed Usng factors from the above table, compute contro ilimits for the means and ranges (Round your answers to 3 decimal places.) Sample Mean aange Sample 7.20 6.52 7.00 7.54 ange 3 2 Na 7.21 53 6 2 1 4 53 249 Upper me for Lower Upam for Lower for bt is the grocess is in control The process is in control The process is not in control