Probability and Statistics for Engineering and the Sciences
Probability and Statistics for Engineering and the Sciences
9th Edition
ISBN: 9781305251809
Author: Jay L. Devore
Publisher: Cengage Learning
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Chapter 15.4, Problem 23E

The accompanying data refers to concentration of the radioactive isotope strontium-90 in milk samples obtained from five randomly selected dairies in each of four different regions.

Region 1 6.4 5.8 6.5 7.7 6.1
2 7.1 9.9 11.2 10.5 8.8
3 5.7 5.9 8.2 6.6 5.1
4 9.5 12.1 10.3 12.4 11.7

Test at level .10 to see whether true average strontium-90 concentration differs for at least two of the regions.

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Probability and Statistics for Engineering and the Sciences

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