A national commission has been appointed to try to reduce crime in the United States. The commission has assembled data for 400 randomly selected cities. These data include whether police walk or do not walk a beat in the city, whether the city has fewer than the average number or more than the average number of streetlights for cities of the same size, and whether its crime rate is below the average or above the average for cities of the same size. For the accompanying data, what should the commission recommend in order to combat crime? Explain your answer.

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Crime Rate Below average Above average Police Do Not Walk Beat Streetlights Crime Rate Below Average Above Average Below Average 83 91 Streetlights Below Average 98 102 Above Average 16 18 Above Average 114 86 Police Walk Beat Crime Rate Below Average Above Average Streetlights Below Average 15 11 Above Average 98 68