twelve samples each containing five parts were taken from a process that produces steel rods that should measure 10 inches in length. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were.... (see attachment)

Determine the upper and lower limits and the overall.... see picture.

twelve samples each containing five parts were taken from a process that produces steel rods that should measure 10 inches in length The length of each rod in t class=


Answer :