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:

Reliability

The quality or state of being reliable, dependable, or able to be trusted to do or perform as expected.

Qualitative Researchers

Individuals specializing in research methodologies that focus on understanding phenomena through observation and interpretation of non-numerical data.

Numeric Data

Information represented in numbers, often used for analysis and to support arguments or insights.

Primary Research Methods

Techniques and methods used to gather original and firsthand data.