A tire manufacturer has been concerned about the number of defective tires found recently. To evaluate the
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A tire manufacturer has been concerned about the number of defective tires found recently. To evaluate the true magnitude of the problem, a production manager selected 10 random samples of 20 units each for inspection. The number of defective tires found in each sample are as follows:
Sample Number Defective 1 0 2 2 3 3 4 2 5 5 6 2 7 1 Sample Number Defective 8 1 9 2 10 3
a. Develop a p-chart with a z = 3.
b. Suppose that the next four samples selected had 5, 2, 4, and 1 defects. What conclusion can you make?
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Related Book For 
Operations Management An Integrated Approach
ISBN: 9781119905523
8th Edition
Authors: R. Dan Reid; Nada R. Sanders
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