Instruction 18-7
a Factory Supervisor Is Concerned That the Time

question 112

Multiple Choice

Instruction 18-7
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 five 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.
$$\begin{array} { | l | l | l | } \hline \text { Hour } & \underline { \underline { X } } & \underline { R } \\\hline 1 & 18.4 & 25 \\\hline 2 & 16.9 & 27 \\\hline 3 & 23.0 & 30 \\\hline 4 & 21.2 & 23 \\\hline 5 & 21.0 & 24 \\\hline 6 & 24.0 & 25 \\\hline 7 & 19.3 & 12 \\\hline 8 & 15.8 & 14 \\\hline 9 & 20.0 & 13 \\\hline 10 & 23.0 & 11 \\\hline\end{array}$$
-Referring to Instruction 18-7,suppose the supervisor constructs an R chart to see if the process is in control.Which expression best describes this chart?

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

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Definitions:

Self-efficacy

Refers to an individual's belief in their capacity to execute behaviors necessary to produce specific performance attainments.

Task-specific

This term refers to skills, abilities, or strategies that are particularly relevant to, and used for, accomplishing a specific task.

Self-efficacy

An individual's belief in their own capacity to execute behaviors necessary to produce specific performance attainments.

Task-specific

relates to skills, abilities, or knowledge that is directly relevant to the performance of a particular job or task.