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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola
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In Exercises, find the range, variance, and

Chapter 3, Problem 13BSC

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QUESTION:

Lead in Medicine Listed below are the lead concentrations (in μ g / g ) measured in different Ayurveda medicines. Ayurveda is a traditional medical system commonly used in India. The lead concentrations listed here are from medicines manufactured in the United States. The data are based on the article “Lead, Mercury, and Arsenic in US and Indian Manufactured Ayurvedic Medicines Sold via the Internet,” by Saper et al., Journal of the American Medical Association, Vol. 300, No. 8. What would be the values of the measures of variation if the medicines contained no lead?

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QUESTION:

Lead in Medicine Listed below are the lead concentrations (in μ g / g ) measured in different Ayurveda medicines. Ayurveda is a traditional medical system commonly used in India. The lead concentrations listed here are from medicines manufactured in the United States. The data are based on the article “Lead, Mercury, and Arsenic in US and Indian Manufactured Ayurvedic Medicines Sold via the Internet,” by Saper et al., Journal of the American Medical Association, Vol. 300, No. 8. What would be the values of the measures of variation if the medicines contained no lead?

ANSWER:

Lead concentrations

(x-)

3

64.8025

6.5

20.7025

6

25.5025

5.5

30.8025

20.5

89.3025

7.5

12.6025

12

0.9025

20.5

89.3025

11.5

0.2025

17.5

41.6025

Total=110.5

375.725

Step 1 of 3

Range=Largest value-Smallest value              

          =                                     

           =17.5

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