Question: A process that is assumed to be in control with limits of 89 2 had sample averages for the x -bar chart of the following:
A process that is assumed to be in control with limits of 89 2 had sample averages for the x-bar chart of the following: 87.1, 87, 87.2, 89, 90, 88.5, 89.5, and 88. Is the process in control?
Select one:
a.
Not enough information to tell.
b.
No, one or more averages exceeded the limits.
c.
No, two or more consecutive points are very near the lower (or upper) limit.
d.
No, there is a distinguishable trend.
e.
Yes.
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