Ten samples of n = 8 have been taken from a manufacturing process. The average of the mens is 40 cm. The average sample range for the 10 samples was 15 cm.
A. Calculate X-bar and the R controls.
B. One sample average is above the UCL of the X-bar chart, what should be done?
C. One sample average is below the LCL of the R chart, what should be done?