Multiple Choice
TABLE 14-3
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 Table 14-3, suppose the analyst constructs an R chart to see if the variability in production times is in control. The R chart is characterized by which of the following?
A) increasing trend
B) decreasing trend
C) in control
D) points outside the control limits
Correct Answer:
Verified
Correct Answer:
Verified
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