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

question 42

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 sample mean and range data were based on 6 observations per hour instead of 5. How would this change affect the lower and upper control limits of an R chart?

• A) LCL would increase; UCL would decrease.
• B) LCL would remain the same; UCL would decrease.
• C) Both LCL and UCL would remain the same.
• D) LCL would decrease; UCL would increase.

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Definitions:

Sensorimotor Substage

A phase in early child development in Piaget's theory where infants learn through interacting with the environment using their senses and motor abilities.

Intellectual Images

Visual representations in the mind that are used for processing and understanding complex ideas or concepts that are not immediately present to the senses.

Working Memory

A brain-based system characterized by its limited ability to retain information temporarily, making it accessible for processing.

Limited Capacity

Refers to the finite cognitive resources available for processing information or performing tasks.