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A manufacturer of precision machine parts produces round shaft for use in the construction of drill presses. T
A manufacturer of precision machine parts produces round shaft for use in the construction of drill presses. The average diameter of a shaft is .56 inch. Inspection samples contain 6 shafts each. The average range of these samples is .006 inch. Determine the upper and lower x-bar control chart limit.
Hint: You need to find the formula for calculating control chart limit.
(x1+x2+x3+x4+x5+x6)/6 = 0.56 +/- 0.006
Means that max should be: 0.566, and:
lower x-bar limit: 0.554
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![]() Miura CB 202 Irons Specd Out with Project X Flighted Shafts and IOMIC Grips US $550.00
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