SCENARIO 18-4
A factory supervisor is concerned that the time it takes workers to complete an important production
task (measured in seconds) is too erratic and adversely affects expected profits. The supervisor
proceeds by randomly sampling 5 individuals per hour for a period of 10 hours. The sample mean and
range for each hour are listed below. She also decides that lower and upper specification limit for the critical-to-quality variable should be
10 and 30 seconds, respectively.
-Referring to Scenario 18-4, suppose the supervisor constructs an chart to see if the process is in-control. What are the lower and upper control limits of this chart?
A) 10.00, 30.00
B) 8.49, 32.03
C) 5.39, 35.13
D) 4.96, 35.56
Correct Answer:
Verified
Q32: SCENARIO 18-3
A quality control analyst for
Q33: SCENARIO 18-4
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A factory supervisor is concerned
Q37: The control limits are based on the
Q38: SCENARIO 18-3
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Q39: SCENARIO 18-4
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Q40: SCENARIO 18-3
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Q58: _ causes of variation are correctable without
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