question archive A team of engineers plans to measure the mass of 300 alloy specimens
A team of engineers plans to measure the mass of 300 alloy specimens
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A team of engineers plans to measure the mass of 300 alloy specimens. each specimen is to be weighed 70 times and a 80% confidence interval for its true mean weight is to be constructed. assume there is no bias in the weighing procedure but there is variation. a) what is the probability that more than 250 confidence intervals will cover the true(mean) mass of the specimens? b) how is the probability calculated that exactly 250 of the intervals cover the true value?
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