Answered: The FDA conducted a study to determine…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 26PFA

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The FDA conducted a study to determine whether corn in a certain region contained unhealthy levels of pesticides. A biologist classified pesticide levels greater than 6.0 parts per million (ppm) as unhealthy. The pesticide levels of a random sample of 23 bushels in the region were measured and recorded. The data are shown in the stemplot below.

Pesticide Levels

2 | 8

3 | 0

3 | 5 8 8

4 | 1 1 2

4 | 6 8 8

5 | 0 1 2 2 3 4

5 | 9 9

6 | 3 4

6 | 6 8

Key: 2 | 8 = 2.8 ppm

What proportion of bushels of corn in the sample had pesticide levels that are classified by the biologist as unhealthy?

The mean pesticide level of the 23 bushels of corn in the sample was 4.90 ppm and the standard deviation was 1.12 ppm.

Construct and interpret a 95 percent confidence interval for the mean pesticide level of corn in the region

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