Random Samples of 4 Items Are Selected from a Manufacturing $\Sigma$

question 36

Multiple Choice

Random samples of 4 items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, $\Sigma$ X = 15,350 and $\Sigma$ R = 411.4
To construct a range chart, what is the upper control limit (UCL) for the range?

• A) 37.553
• B) 411.4
• C) 0.00
• D) 102.85

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Definitions:

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Labour Force

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High Instrumentality

The belief or expectation that high performance will lead to desirable outcomes.