A county health department wants to know whether significant ground water contam

Question

A county health department wants to know whether significant ground water contamination has occurred due to the use of a specific pesticide on farms in 5 different communities within the county. To do this, they obtain samples from 20 wells in each of these communities and determine the percentage of wells in each community that have significant pollution with this pesticide. To determine whether the communities differ in the frequency of polluted wells, what statistical test should be used? Paired samples t-test One way analysis of variance Independent samples t-test Chi-square test

Explanation / Answer

Ans:

Chi square test is the correct answer(as we testing the difference in frequency counts of different communities)

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