Integrated circuits consist of electric channels that are etched onto siliconwafers. Acertain proportion of circuits are defective
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a. Since only4%of the 100 circuits had undercutting, we can conclude that the goal has been reached.
b. Although the sample percentage is under 5%, this may represent sampling variation, so the goal may not yet be reached.
c. There is no use in testing the new process, because no matter what the result is, it could just be due to sampling variation.
d. If we sample a large enough number of circuits, and if the percentage of defective circuits is far enough below 5%, then it is reasonable to conclude that the goal has been reached.
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