Question: Can people really identify their favorite brand of cola Volunteers

Can people really identify their favorite brand of cola? Volunteers tasted Coke, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At α = .05, is the correctness of the prediction different for regular cola and diet cola drinkers? Since it is a 2 × 2 table, try also a two-tailed, two-sample z test for π1 = π2 and verify that z2 is the same as your chi-square statistic.


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  • CreatedAugust 19, 2015
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