According to Mediaweek, there are three methods of advertising on the Web. Method 1 is to serve ads to users who clicked on an icon for the ad. Method 2 serves ads through visits to the company's Web site. And Method 3 uses highly targeted content sites.13 Which method, if any, is most effective? Suppose the following data are the numbers of responders to each method who have eventually made a pur- chase, taken over a random sample of days for each method.
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Method 1:
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55, 79, 88, 41, 29, 85, 70, 68, 90
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Method 2:
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42, 21, 38, 40, 39, 61, 44, 26, 28
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Method 3:
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108, 111, 81, 65, 89, 100, 92, 97, 80
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Conduct the test and state your conclusion.