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Chapter 10 | Hypothesis Testing 13. A city police department has always had an equal number of officers on patrol in each beat. However, each month the police chief reevaluates to make sure that he is utilizing the department's resources and manpower effectively. To do this, he records the number of calls received from each beat over the course of the month. The data for one month are summarized below. Does this evidence support the claim that there is a difference in the number of calls between the different areas of the city, at the 0.05 level of significance? Calls Received in One Month Beat 1 Beat 2 Beat 3 Beat 4 Number of Calls 28 31