Can people really recognize their favorite brand of cola?, Ask an Expert

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Can people really recognize their favorite brand of cola? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with results shown below.

Research problem: At α = .05, is correctness of the prediction different for the two kinds of cola drinkers?

Could you recognize your favorite brand in this kind of test?

Since it is a 2 × 2 table, try as well a two-tailed two-sample z test for π1 = π2 and verify that z2 is the same as your chi-square statistic. Which test do you prefer? Why?

Correct	Regular Cola	Diet Cola	Row total
Yes, got it right	7	7	14
No, got it wrong	12	20	32
column total	19	27	46

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M922142

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