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:

Family Engagement

The active involvement and participation of families in the educational process and activities relating to their child's learning and development.

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A specific educational institution typically serving students in the middle grade levels, named after Thomas Jefferson, though its characteristics depend on the locality.

Family Engagement

signifies the participation and involvement of families in the educational and developmental processes of their children, aiming to foster a cooperative and supportive relationship between home and school.

Parent Involvement

Refers to the participation of parents in their children's education and school activities to support academic success and well-being.