Answered: Nonparametric: A small study is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Nonparametric: A small study is conducted to compare birth weight in babies born to different groups of mothers based on their smoking status (nonsmokers, ex-smokers, light smokers, and heavy smokers). Is there a significant difference between birth weights due to maternal smoking status? Use the Kruskal Wallis test with a 5% level of significance. What is R₂ (Group 2)?

Birth weights of infants in four groups of mothers. (Observed data)

Group 1 (Nonsmokers)	Group 2 (Ex-smokers)	Group 3 (<1/2 pack/day)	Group 4 (≥1/2 pack/day)
8.6	7.4	6.0	7.0
8.5	8.6	6.8	5.2
6.3	8.5	7.3	6.1
9.3	5.4	5.7	6.7
8.0	9.2	8.7	6.6
6.8		6.3	7.4
			4.9
			6.3

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