Association between two variables

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To test whether there is any association between two variables using Chi-Square test for independence.

Can people really identify their favorite brand of cola? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research question: At α = .05, is the correctness of the prediction different for the two types of cola drinkers? Could you identify your favorite brand in this kind of test? Since it is a 2 × 2 table, try also a two-tailed two-sample z test for π1 = π2 (see Chapter 10) 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
Col Total	19	27	46

Reference no: EM1314983

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