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Chi-square for independence of attributes.

Can people really make out their favourite brand of cola? Volunteers tasted Coca-Cola Classic, Pepsi, Diet Coke, and Diet Pepsi, with the results shown below. Research problem: At _ = .05, is the correctness of the prediction different for the two types of cola drinkers? Could you recognize your favourite brand in this kind of test? Since it is a 2 _ 2 table, try also a two-tailed two-sample z test for ð1 = ð2 and confirm 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

 

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918215

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