SCENARIO 18-4
a Factory Supervisor Is Concerned That the Time

question 110

Multiple Choice

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. $$\begin{array} {ccc} \underline {\text { Hour }} & \underline { \bar { X } } & \underline { R } \\1 & 18.4 & 25 \\2 & 16.9 & 27 \\3 & 23.0 & 30 \\4 & 21.2 & 23 \\5 & 21.0 & 24 \\6 & 24.0 & 25 \\7 & 19.3 & 12 \\8 & 15.8 & 14 \\9 & 20.0 & 13 \\10 & 23.0 & 11\end{array}$$ 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 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:

Temporal Discounting

The tendency to devalue rewards and benefits that are received in the future compared to those received in the present.

Emotional Numbness

A state in which an individual feels detached from their emotions or feelings, often as a response to trauma or extreme stress.

Regret

Involves feeling sorry for one’s misfortunes, limitations, losses, transgressions, shortcomings, or mistakes.

Anger

An emotional response to a real or imagined threat or provocation