An article in Business Week describes how three online news services now supply Web surfers quick information on developing stories. Suppose that a random sample of users is available from various parts of the country. Data are shown in the table below. Is there evidence that the three Web news services have different success rates at different regions of the country?

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Northeast 78 115 208 South 15 10 West 109 Google News PBS Online New York Times Midwest 65 50 40 52