10. Lumber Specs The manager of a buildingsupplies company randomly samples incoming lumber to see whether it...
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10. Lumber Specs The manager of a buildingsupplies company randomly samples incoming lumber to see whether it meets quality specifications.
From each shipment, 100 pieces of 234 lumber are inspected and judged according to whether they are first (acceptable) or second (defective) grade. The proportions of second-grade 234s recorded for 30 shipments were as follows:
a. Construct a control chart for the proportion of second-
grade 234s in samples of 100 pieces of lumber.
b. Explain how the control chart can be of use to the manager of the building-supplies company.
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Related Book For 
Introduction To Probability And Statistics
ISBN: 9780357114469
15th Edition
Authors: William Mendenhall Iii , Robert Beaver , Barbara Beaver
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