TABLE 17-4 A Factory Supervisor Is Concerned That the Time It Takes

question 81

Multiple Choice

TABLE 17-4
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 Table 17-4, suppose the supervisor constructs an chart to see if the process is in-control. Which expression best describes this chart?

• A) Decreasing trend
• B) Hugging the center line
• C) Increasing trend
• D) Cycles

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Definitions:

Melatonin

A hormone produced by the pineal gland which regulates sleep and wakefulness cycles in the human body.

Confidence

The feeling or belief that one can rely on someone or something; firm trust.

Witness Memory

Witness memory refers to the recollection of events, people, or objects by individuals who have observed a particular incident, important in the context of eyewitness testimony.

Accuracy Indicator

An accuracy indicator measures the correctness of responses, often used in research or testing scenarios.