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Lower control limits

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To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces. Each sample contains 10 cans. The average range is 0.4 ounces. The lower control chart limit for the average would be?

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Computes lower control limit.

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Answer: 11.8768.

Lower control limit (LCL)= Overall ...

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