Random Samples of Four Items Are Selected from a Manufacturing

question 84

Multiple Choice

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, ΣX = 15,350 and ΣR = 411.4. To construct a mean chart, what is the upper control limit (UCL) for the mean?

• A) 614.00
• B) 411.4
• C) 625.996
• D) 3837.5

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Definitions:

Conscious Mind

The aspect of mind that is aware of thoughts, feelings, and surroundings at any given moment.

Regression

A defense mechanism in psychoanalytic theory where an individual's behavior reverts to an earlier stage of development when faced with stress.

Fixation

An obsessive interest or feeling stuck at a particular stage of psychosexual development, according to Freud.

Repression

A psychological defense mechanism where distressing memories, thoughts, or impulses are excluded from conscious awareness.