Question

A technology student project group worked with a machine shop that employs a CNC lathe in the machining of a part produced for a heavy equipment manufacturer. Some summary statistics for a particular diameter on the part obtained from 5 samples of n=4 parts turned on the lathe are given below. The units are inches.

     Sample       x-bar               R   

     1                  1.18                .01   

     2                  1.19                .02   

     3                  1.17                .02   

     4                  1.17                .08   

     5                  1.18                .07

Answer 1