Two-tailed two-sample z test-chi-square statistic

Reference no: EM1320533

Q1) Can people really recognize their favourite brand of cola? Volunteers tasted Diet Pepsi, Coca-Cola Classic, Pepsi, Diet Coke, and with results given below.

Research question: At α = .05, is correctness of the prediction different for 2 kinds of cola drinkers?

Could you identify your favourite brand in this kind of test?

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

Reference no: EM1320533

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