Estimation error and sample size A random sample of 36 cartons of detergent has a mean of
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Estimation error and sample size A random sample of 36 cartons of detergent has a mean of 32.40 oz. and a standard deviation of 2.3 oz. The contents of the cartons are normally distrib- uted.
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REQUIRED a. Find the range within which the population mean falls with a 90 percent confidence limit. b. Find the sample size needed for a 90 percent confidence interval if the error is to be limited to .60 oz.
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