Question: Using (q_{0.05}=4.041) for the Tukey HSD method, compare the pollution levels of the three agencies in Exercise 12.47. Data From Exercise 12.47 12.47 Samples of

Using $q_{0.05}=4.041$ for the Tukey HSD method, compare the pollution levels of the three agencies in Exercise 12.47.

Data From Exercise 12.47

12.47 Samples of groundwater were taken from 5 different toxic-waste dump sites

by each of 3 different agen- cies: the EPA, the company that

12.47 Samples of groundwater were taken from 5 different toxic-waste dump sites by each of 3 different agen- cies: the EPA, the company that owned each site, and an independent consulting engineer. Each sample was analyzed for the presence of a certain contaminant by whatever laboratory method was customarily used by the agency collecting the sample, with the following results: Concentration (parts per million) Site A Site B Site C Site D Site E Agency 1 23.8 7.6 15.4 30.6 4.2 Agency 2 19.2 6.8 13.2 22.5 3.9 Agency 3 20.9 5.9 14.0 27.1 3.0

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12.48 Using q0.05 = 4.041 for the Tukey HSD method, compare the pollution levels of the three agencies in Exercise 12.47.

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