Statistics For Business And Economics, University Of Connecticut
18th Edition
ISBN: 9781323751497
Author: Mcclave/benson/sincich
Publisher: Pearson Education
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Chapter 15.3, Problem 15.21ACB
a.
To determine
The ranks for the data.
b.
To determine
To find: The sum of the ranks of the observations from the old design.
c.
To determine
To find: The sum of the ranks of the observations from the new design.
d.
To determine
To obtain: The Wilcoxon rank sum statistic.
e.
To determine
The distribution of bursting strengths differs for the old and new designsor not.
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Second-Hand Smoke: Data Set 12 “Passive and Active Smoke” in Appendix B includes cotinine levels measured in a group of nonsmokers exposed to tobacco smoke (n = 40, Mean = 60.58 ng>mL, s = 138.08 ng>mL) and a group of nonsmokers not exposed to tobacco smoke (n = 40, Mean = 16.35 ng>mL, s = 62.53 ng>mL). Cotinine is a metabolite of nicotine, meaning that when nicotine is absorbed by the body, cotinine is produced.
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The aging Neotropical termites (Neocapritermes taracua) secrete a sticky, blue-colored liquid that they spew to intruding termites. The younger Neotropical termites secrete a liquid that lacks the blue component, so it is white in appearance. In an experiment that measured the toxicity of the blue substance, the researchers placed one drop of either the blue liquid or the white liquid on individuals of a second termite species, Labiotermes labralis. Of the 41 Labiotermes labralis that got the blue drop, 37 were immobilized. Of the 40 Labiotermes labralis that got the white drop, 9 were immobilized. Is the blue liquid toxic compared to the white liquid?
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y = 42, 37, 37, 28, 18, 18, 19, 20, 15, 14, 14, 13, 11, 12, 8, 7, 8, 8, 9, 15, 15
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Chapter 15 Solutions
Statistics For Business And Economics, University Of Connecticut
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