TABLE 14-4 A Factory Supervisor Is Concerned That the Time It Takes

question 97

Multiple Choice

TABLE 14-4
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 14-4, suppose the supervisor constructs an 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:

Population

The whole number of people or inhabitants in a country or region.

Sample

The subset of the population that the investigator studies in order to learn about the population at large.

General Psychology Students

Individuals engaged in the study of psychology's fundamental principles, theories, and applications.

Study Effects

The outcomes or changes that result from conducting a specific study, which may include intended or unintended consequences on the subjects.