18. A sharpening machine at the Carolina Electric Razor Company sharpens the blades on rotary cutter heads

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18. A sharpening machine at the Carolina Electric Razor Company sharpens the blades on rotary cutter heads for electric razors. If there is a burr on any of the cutter blades, the razor will not operate properly, so random samples of 50 parts are inspected reg- ularly to see if the machine is operating properly. The results of 10 samples are 0.08, 0.08, 0.04, 0.12, 0.20, 0.24, 0.04, 0.12, 0.08, 0.04. Establish the 30 control limits for the proportion defective for this process.

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Muhammad Salman Alvi

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