A random sample of 10 pairs of identical houses was chosen in a large Midwestern city, and

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A random sample of 10 pairs of identical houses was chosen in a large Midwestern city, and a passive solar heating system was installed in one house from each pair. The total fuel bills (in dollars) for three winter months for these homes were then determined, as shown in the accompanying table. Assuming normal population distributions, find a 90% confidence interval for the difference between the two population means.
A random sample of 10 pairs of identical houses was
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Statistics For Business And Economics

ISBN: 9780132745659

8th Edition

Authors: Paul Newbold, William Carlson, Betty Thorne

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