The data in Table 17.9 consist of 30 subgroups of measurements that specify the location of a
Question:
TABLE 17.9
30 Subgroups of Tube Hole Location Dimensions for Air Conditioner Compressor Shells
b. Set up and R charts for the 15 subgroups that were observed on March 21 (do not use any of the March 22 data). Do these x and R charts show statistical control?
c. Using the control limits you computed by using the 15 subgroups observed on March 21, set up and R charts for all 30 subgroups. That is. add the subgroup means and ranges for March 22 to your X and R charts, but use the limits you computed from the March 21 data.
d. Do the and R charts obtained in part c show statistical control? Explain.
e. Does it appear that changing to die press #628 is an assignable cause? Explain. (The die press is the machine that is used to punch the tube hole.)
f. Does it appear that making a die repair is an assignable cause? Explain.
Step by Step Answer:
Business Statistics In Practice
ISBN: 9780073401836
6th Edition
Authors: Bruce Bowerman, Richard O'Connell