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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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Solved: Effect of Lead on IQ Score Listed below are full

Chapter 13, Problem 1 BSC

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QUESTION:

Problem 1BSC

Effect of Lead on IQ Score Listed below are full IQ scores from simple random samples of subjects with low lead exposure, medium lead exposure, and high lead exposure (from Data Set in Appendix B). In using the Kruskal-Wallis test, we must rank all of the data com­bined, then we must find the sum of the ranks for each- sample. Find the sum of the ranks for each of the three samples.

    Low Lead Level

Medium Lead Level

High Lead Level

70

72

82

85

90

93

86

92

85

76

71

75

84

86

85

 

79

 

Mile 1   3:15   3:24   3:23   3:22   3:21

Mile 2   3:19   3:22        3:21   3:17   3:19

Mile 3   3:34   3:31   3:29   3:31   3:29

Questions & Answers

QUESTION:

Problem 1BSC

Effect of Lead on IQ Score Listed below are full IQ scores from simple random samples of subjects with low lead exposure, medium lead exposure, and high lead exposure (from Data Set in Appendix B). In using the Kruskal-Wallis test, we must rank all of the data com­bined, then we must find the sum of the ranks for each- sample. Find the sum of the ranks for each of the three samples.

    Low Lead Level

Medium Lead Level

High Lead Level

70

72

82

85

90

93

86

92

85

76

71

75

84

86

85

 

79

 

Mile 1   3:15   3:24   3:23   3:22   3:21

Mile 2   3:19   3:22        3:21   3:17   3:19

Mile 3   3:34   3:31   3:29   3:31   3:29

ANSWER:

Solution 1BSC

Ranks for the High Lead Level are 7 , 16

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