Question: Data were collected on a quantitative measure with a subgroup size of three observations. Thirty subgroups were collected, with the following results:
x= = 1,3454.4 R¯ = 209.3
a. Determine the Shewhart factors that will be needed if x- and R-charts are to be developed.
b. Compute the upper and lower control limits for the R-chart.
c. Compute the upper and lower control limits for the x-chart.