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SCENARIO 19-3 A Quality Control Analyst for a Light Bulb Manufacturer Is

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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.
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 x̄ chart to see if the production process is in-control.What is the upper control limit (UCL) for this chart? A) 62.15 B) 60.95 C) 59.85 D) 58.75
-Referring to Scenario 19-3,suppose the analyst constructs an x̄ chart to see if the production process is in-control.What is the upper control limit (UCL) for this chart?


A) 62.15
B) 60.95
C) 59.85
D) 58.75

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