Confidence Interval


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The caffeine content of a random sample of 34 of black coffee dispensed by a new machine is measured. The mean and standard deviation are 90.8 mg and 53.77 mg, respectively. What is the sample size needed to obtain a margin of error of 10.97 with a 90% confidence interval? Calculate a 95% confi... Dec 09 2011 01:47 PM


Solution ID:609234 | This paper was updated on 26-Nov-2015

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