SCENARIO 19-4 A Factory Supervisor Is Concerned That the Time It Takes

question 13

Multiple Choice

SCENARIO 19-4
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 19-4,suppose the supervisor constructs an x̄ chart to see if the process is in-control.Which expression best describes this chart?

• A)Decreasing trend
• B)In-control
• C)Increasing trend
• D)Individual outliers

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Definitions:

Canalization

A concept in developmental biology referring to the ability of an organism to produce the same phenotype regardless of variability of its environment or genotype.

Visual Cliff

An experimental apparatus used to study infants' and young animals' perception of depth and their ability to understand visual cues related to depth.

Depth Perception

The visual ability to perceive the world in three dimensions and to judge the distance of objects.

Babinski Reflex

A reflex action in infants, which is elicited by stroking the foot and results in the toes fanning out, indicative of neurological function.