The following table gives the number of arrests made last year for violations of the narcotic drug laws in 24 communities. The data given are rates of arrest per 10,000 inhabitants.

At a = 0.05 , is there sufficient evidence to reject the hypothesis that the mean rates of arrests are the same in all four sizes of communities?
a. Solve using the p-value approach.
b. Solve using the classical approach.

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Cities Cities 23 27 26 (over 250,000) (under 250,000) Communities Communities Rural 45 34 25 16 19 28 42 37 28 17 10 23 34 37