The upper and lower control limits for the range chart

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A company that produces ready-mix concrete in 50 lb bags uses SPC to study variation. They have taken thirty-five random samples, with 7 bags in each sample, weighing each bag. The results are: Overall mean = 51.75 lbs; Average range = 1.78 lbs. The upper and lower control limits for the Range Chart are:

Reference no: EM131438300

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The upper and lower control limits for the range chart : A company that produces ready-mix concrete in 50 lb bags uses SPC to study variation. They have taken thirty-five random samples, with 7 bags in each sample, weighing each bag. The results are: Overall mean = 51.75 lbs; Average range = 1.78 lbs. The ..

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