Multiple Choice
SCENARIO 19-3 A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic.Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day. 
-Referring to Scenario 19-3, suppose the analyst constructs an 
chart to see if the production process is in-control.Which expression best describes this chart?
A) In-control
B) Increasing trend
C) Decreasing trend
D) Individual outliers
Correct Answer:
Verified
Correct Answer:
Verified
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