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

question 98

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. What are the lower and upper control limits for this R chart?

• A) -2.33, 43.13
• B) -2.28, 42.28
• C) 0, 42.28
• D) 0, 43.13

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Definitions:

Prototype

An early sample, model, or release of a product or concept used to test a process or act as a thing to be replicated or learned from.

Ingroup Differentiation Bias

A bias where individuals perceive greater variation and uniqueness among members of their own group (ingroup) compared to those in an outgroup.

Outgroup Homogeneity Bias

The tendency to perceive members of an outgroup as more similar to each other than they really are, often leading to stereotyping.

Double-Standard Thinking

Holding different sets of principles for similar situations, often leading to unfair or biased judgments and practices.