Calculate the capability indices Cp and Cpk for the process. The LSL and USL are 24 and 26 g, respectively; the target being at the center of the specification. Use R/d2 to estimate the process standard deviation. Make sure that the estimates for the process mean and process standard deviation are made from a process that is in control.
8 9 10 11 12 1 2 E 4 7 8 9 10 8 9 10 11 12 TIME AM AM AM AM PM PM PM PM PM PM PM PM PM PM PM AM AM AM AM PM 25.0 24.3 25.2 24.3 26.2 24.1 25.1 24.2 24.1 25.1 24.6 23.9 25.1 24.8 24.4 23.9 24.5 24.4 25.2 23.1 2 24.5 25.1 24.0 24.0 25.1 24.0 25.2 24.1 24.3 25.4 24.9 23.7 27.3 24.4 24.3 23.4 24.8 24.5 25.6 23.2 3 24.5 24.2 25.1 24.3 25.2 24.4 25.0 24.3 24.1 25.2 24.1 24.2 27.3 24.1 24.9 23.8 24.8 24.8 25.3 23.4 4 25.1 24.1 24.2 24.0 24.2 25.0 25.4 24.2 25.0 24.4 24.0 24.1 27.1 24.3 25.0 24.0 24.9 24.6 25.2 23.4