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 is the center line of the chart?
A) 20.00
B) 20.26
C) 21.00
D) 24.26
Correct Answer:
Verified
Q31: SCENARIO 18-4
A factory supervisor is concerned
Q32: SCENARIO 18-3
A quality control analyst for
Q33: SCENARIO 18-4
A factory supervisor is concerned
Q35: SCENARIO 18-3
A quality control analyst for
Q37: The control limits are based on the
Q37: SCENARIO 18-4
A factory supervisor is concerned
Q38: SCENARIO 18-3
A quality control analyst for
Q39: SCENARIO 18-4
A factory supervisor is concerned
Q40: SCENARIO 18-3
A quality control analyst for
Q42: In the United States,the control limits on
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