Q1) Can people actually recognize their favorite brand of cola? Volunteers tasted Classic, Pepsi, Diet Pepsi Diet Coke, and Coca-Cola, with results given below. Research question: At _ = .05, is correctness of prediction dissimilar for the 2 types of cola drinkers? Could you recognize your favourite brand in this type of test? As it is a 2 _ 2 table, try also two-tailed two-sample z test for ð1 = ð2 and verify that z2 is same as your chi-square statistic. Which test do you favour? Describe why?
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Correct?
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Regular Cola
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Diet Cola
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Row Total
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|
Yes, got it right
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7
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7
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14
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No, got it wrong
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12
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20
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32
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Column Total
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19
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27
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46
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