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(Solved): In a preliminary study, a simple random sample of 100 computer chips was tested, and 18 of them w ...



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In a preliminary study, a simple random sample of 100 computer chips was tested, and 18 of them were found to be defective. Now another sample will be drawn in order to construct a confidence interval for the proportion of chips that are defective. Use the results of the preliminary study to estimate the sample size needed so that the confidence interval will have a margin of error of 0.03 . Round the answer to next whole number. The required sample size is


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A simple random sampling of 100 computer chips was tested. 18 of them were found to be defective.
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