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

question 71

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 R chart to see if the variability in collection times is in-control. This R chart is characterized by which of the following?

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

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Definitions:

Collarbone (Clavicle)

A bone located horizontally across the front of the shoulder, connecting the arm to the body.

Primates

An order of mammals that includes humans, apes, monkeys, and prosimians, characterized by large brains, forward-facing eyes, and opposable thumbs.

Flexible Movements

Refers to the adaptability and versatility of physical actions or maneuvers, often highlighting the ability to respond to different challenges or environments.

Firm Posture

A stance or position that is physically steady, confident, or determined.