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Quiz6a_KEY_Sp11

# Quiz6a_KEY_Sp11 - A Name_KEY 28 March 2011 IE330 Spring...

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Name: ______________KEY______________________________ A 28 March 2011 IE330 Spring 2011 Closed book, closed notes, no calculators Quiz #6a For all questions, please refer to the ANOVA output shown below. (From Navidi, W. (2008). Statistics for Engineers and Scientists, 2 nd Edition . McGraw-Hill: New York) Shown below is data taken by archeologists to determine the diets of ancient civilizations by measuring the ratio of carbon-13 to carbon-12 in the bones found at burial sites. (A high ratio suggests a diet rich in grasses, while a low ratio suggests herbaceous plants.) One-way ANOVA: 0-11, 12-24, 25-45, 46+ Source DF SS MS F P Factor 3 19.20 6.40 0.83 0.486 Error 45 348.76 7.75 Total 48 367.97 S = 2.784 R-Sq = 5.22% R-Sq(adj) = 0.00% Individual 95% CIs For Mean Based on Pooled StDev Level N Mean StDev ---------+---------+---------+---------+ 0-11 12 16.967 2.201 (----------*----------) 12-24 10 15.450 3.638 (-----------*-----------) 25-45 18 16.478 2.622 (--------*--------) 46+ 9 15.444 2.728 (-----------*-----------) ---------+---------+---------+---------+ 15.0 16.5 18.0 19.5 Tukey 95% Simultaneous Confidence Intervals Individual confidence level = 98.94% 0-11 subtracted from: Lower Center Upper ---------+---------+---------+---------+ 12-24 -4.694 -1.517 1.661 (------------*------------) 25-45 -3.255 -0.489 2.277 (----------*----------) 46+ -4.795 -1.522 1.750 (------------*------------) ---------+---------+---------+---------+ -2.5 0.0 2.5 5.0 12-24 subtracted from: Lower Center Upper ---------+---------+---------+---------+ 25-45 -1.899 1.028 3.955 (-----------*-----------) 46+ -3.415 -0.006 3.404 (-------------*-------------) ---------+---------+---------+---------+ -2.5 0.0 2.5 5.0 25-45 subtracted from: Lower Center Upper ---------+---------+---------+---------+ 46+ -4.063 -1.033 1.996 (-----------*-----------) ---------+---------+---------+---------+ -2.5 0.0 2.5 5.0

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Quiz6a_KEY_Sp11 - A Name_KEY 28 March 2011 IE330 Spring...

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