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The Width of a Gold Bar Is Intended to Be

question 134

Essay

The width of a gold bar is intended to be 0.42 cms. Inspection samples contain six bars each. The average range of these samples is 0.007 cms. What are the upper and lower control limits for the x-bar and R-chart for this process, using 3-sigma limits?


Definitions:

Pertaining

Relating or referring to; concerning.

Four

The number following three and preceding five, represented in numerals as 4.

Quadra-

A prefix meaning four or fourfold, used to describe quantities or units.

Within

Inside or not further than a certain area, time period, or range.

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