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

question 113

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 lower control limit (LCL) for the range?

• A) 602.004
• B) 411.400
• C) 625.666
• D) 0.00

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Definitions:

Million BTUs

Million British Thermal Units (BTUs) is a unit of energy measurement, equivalent to the amount of energy needed to heat or cool one million pounds of water by one degree Fahrenheit.

Energy Efficiency

The use of technology or practices that reduce the amount of energy required to provide products and services.

ACME Corporation

A fictional company often used as a generic example in discussions or illustrations of business concepts.

Resource Demand

The desire and ability of firms to acquire economic resources or inputs like labor, technology, and raw materials, influenced by the price of these resources and the level of economic output.