a. Is if safe to estimate the proportion of circuits that fail below 1200h? b. What is
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a. Is if safe to estimate the proportion of circuits that fail below 1200h?
b. What is this proportion?
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2. The failure time in hours of 10 LSI memory devices follows: 1210, 1400, 1695, 1900, 2105, 2230, 2250, 2500 and 2625. (5 points) The data is plotted on a normal probability plot below. Probability Plot of Failure Times Extended Normal - 95% CI 99.9 Mean 2083 StDev 497.6 99 N 100 AD 0.232 95 P-Value 0.796 Percent 88288922 24 90 40 30 20 5 1 0.1 0 1000 1200 2000 Failure Times Extended 3000 4000 2. The failure time in hours of 10 LSI memory devices follows: 1210, 1400, 1695, 1900, 2105, 2230, 2250, 2500 and 2625. (5 points) The data is plotted on a normal probability plot below. Probability Plot of Failure Times Extended Normal - 95% CI 99.9 Mean 2083 StDev 497.6 99 N 100 AD 0.232 95 P-Value 0.796 Percent 88288922 24 90 40 30 20 5 1 0.1 0 1000 1200 2000 Failure Times Extended 3000 4000
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Managing Controlling and Improving Quality
ISBN: 978-0471697916
1st edition
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
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