Posted by **Gayla** on Monday, June 23, 2008 at 5:12am.

Can people really identify their favorite brand of cola? At a= .05, is the correctness of the prediction different for the two types of cola drinkers? Since it is 2 x 2 table, try also a two-tailes two-sample z test for n1 = n^2 and verify that z2 is the same as your chi-square statistic.

COLA

Correct? Regular Diet Row

Cola Cola Total

yes,got

it right 7 7 14

no,got it

wrong 12 20 32

Col total 19 27 46

- statistics -
**Writeacher**, Monday, June 23, 2008 at 8:10am
To quote another teacher at Jiskha: "You will find here at Jiskha that long series of questions, posted with no evidence of effort or thought by the person posting, will not be answered. We will gladly respond to your future questions in which **your thoughts** are included."

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