Table 8 lists the prices of certain randomly selected college textbooks in statistics, psychology, economics and business. TABLE 8 Statistics Psychology Economics Business 102 88 75 84 81 101 99 115 93 92 80 94 78 86 105 103 112 91 87 Using the 5% significance level, test the null hypothesis that the mean prices of college textbooks in statistics, psychology, economics and business are all equal

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