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A magazine had more than 300 pages and a random sample of 25 pages of the...

A magazine had more than 300 pages and a random sample of 25 pages of the magazine was taken and the number of words on each page counted. The mean number of words for the sample was 287 words and the standard deviation was 38.4 words. Calculate (correct to the nearest whole number) 80% confidence limits for the mean number of words for the pages of the entire magazine. (For 80% confidence, Z=1.282)

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