You should show your work to earn partial credit. You must show ALL of your work on the pages provided. There should be plenty of room to show your work on the page with each problem.
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27
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Points Earned
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If each sample taken has 500 units, and the average proportion nonconforming is 0.034, what is the upper and lower control limits for the p-chart?
If you sample 450 parts per day from a daily production of 12,000 parts, what is the upper and lower control limits of an np chart if the average percentage of good parts is 97.5%?
If you inspect 50 automobile windshields and find 266 nonconformities, determine the upper and lower control limits for the c-charts.
If c = 4, determine the sampling plan that will provide the Producer's Risk protection based on a process avererage of 1.1% nonconforming, and assurance that the lot will be rejected 5% of the time.
C = 4 n = _____
If c = 2, determine the sampling plan that will provide Consumer's Risk protection based on a process average of 2.8% nonconforming, and assurance the lot will be accepted 10% of the time.
C=2 n= _____