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IET 3339, Basic Statistics
1. 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 pchart?
2. 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%?
3. If you inspect 50 automobile windshields and find 266 nonconformities, determine the upper and lower control limits for the ccharts.
Chapter 9
4. 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 = _____
5. 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= _____
Posted Date: 4/17/2012 11:38:02 PM  Location : United States
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