Question
On an X-bar chart, many plot points are noted in zone B, some in zone C, and a few in zone A. What could be
On an X-bar chart, many plot points are noted in zone B, some in zone C, and a few in zone A. What could be occurring in the process?
Select one:
a. Stratification
b. Trends or overcorrections
c. Mixtures or systemic variation
d. Improper calculation of the control limits
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Advanced Engineering Mathematics
Authors: ERWIN KREYSZIG
9th Edition
0471488852, 978-0471488859
