Factor for R-Chart: Factor for R- Chart : Lower Control Limit Lower Control Limit Az DA 0 Number of Observations in Factor for X-Chart each sample n 1.88 3 1.02 4 0.73 5 0.58 0.48 0.42 0.37 0.34 10 L 0.31 L 0 0 0 0.08 0.14 0.18 0.22 3.27 2.27 2.28 2.11 2.00 1.92 1.86 1.82 1.78 Cpk USL LSL 22 19|| Process std Process mean 21 20 In this problem, we assume that you are measuring the weight of an item that you are producing. You want to see if the process is in control or not. There are 19 samples and for each sample, there are 5 observations. By using sample mean and sample range control charts, determin if the process is in control? You need to obtain A2, D3, and D4 from a table that can be found in Exhabit 13.7 of the Textbook or on Page 17 of Powerpoint slides of CH 13, Quality Control. 201 Samples Obs 1 Obs 2 21 20 21.8 20.8 19.5 20.9 18.8 20.45 18.8 20.9 20.86 20.9 19.8 18.5 20.8 20.9 17120 18 20.85 19 20.8 Observations (sample size) Obs 3 Obs4 21.5 20 20.8 20.8 22 20 20.45 19.99 20.5 21.1 20.9 20.86 20 22 20.45 19.99 20.8 19.99 19.99 19.2 20.5 20.45 19.99 20.9 20.86 20.8 21.5 20.3 20.86 20.86 20.45 19.99 20 20.8 20.9 20.45 19.99 20.86 20.7 20.86 20.45 19.99 20.66 20.45 19.99 20.45 19.99 20 20.8 Obs 5 20.5 19.85 21 21.5 20.8 18.99 20.5 20.45 20.86 21.4 21.8 19.5 20.86 21.5 20.55 20 For this problem, USL = 22 and LSL = 19. By using the USL and LSL, please determine the process capability index Cpk. 221 20 20.5 20.91 20.14 20.86 19.8 22 D2 D3 D4 |A2