Nagy_BUS207.920_Ch9 - Chris Nagy BUS207.920 Chapter 9 pages...

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Chris Nagy BUS207.920 11/6/2007 Chapter 9, pages 319-322 #31 - 63 EOO
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31 6.5 +/- 1.989(1.7/√85= 6.13 to 6.87 years 35 a populaton mean is unknown b 8.32±1.685(3.07/√40) = between 7.50 and 9.14 c 10 is outside the confidence interval, and is therefore unreasonable 39 61 43 a $751/12= $62.583 b 62.583±1.796(3.94/√12)= between $60.54 to $64.63 c $60 is outside the confidence interval and is ths unreasonable
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