How many full-page advertisements are found in a magazine? In an October issue of Muscle and Fitness, there were 252 ads, of which 97 were full-page. For the same month, the magazine Glamour had 342 ads, of which 167 were full-page.,(a) Is the difference significant at ? = .01?,(b) Find the p-value.,(c) Is normality assured?,(d) Based on what you know of these magazines, why might the proportions of full-page ads differ? (Data are from a project by MBA students Amy DeGuire and Don Finney.)

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