Concerned about graffiti, mayors of nine suburban communities instituted a citizen Com- munity Watch program.
(a) State the hypotheses to see whether the number of graffiti incidents declined.
(b) Find the test statistic.
(c) State the critical value for α = .05.
(d) Find the p-value.
(e) State your conclusion.

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Community Monthly Incidents After Monthly Incidents Before 12 Burr Oak Elgin Corners Elm Grove Greenburg Huntley North Lyman South Lyman Pin Oak Victorville 4 4 4 4 4