If the mean of a population is 250 and its standard deviation is 20, approximately what proportion

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If the mean of a population is 250 and its standard deviation is 20, approximately what proportion of observations is in the interval between each pair of values?
a. 190 and 310
b. 210 and 290

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Statistics For Business And Economics

ISBN: 9780132745659

8th Edition

Authors: Paul Newbold, William Carlson, Betty Thorne

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Question Posted: Jul 06, 2015 07:28 AM

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If the mean of a population is 250 and its standard deviation is 20, approximately what proportion

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Mean 250 20 a To determine k use the lower or upper limit of t...View the full answer

Statistics For Business And Economics

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