Question: Use the contingency table and expected frequencies from Exercise 9. At a = 0.05, test the hypothesis that the variables are dependent. Perform the indicated

Use the contingency table and expected frequencies from Exercise 9. At a = 0.05, test the hypothesis that the variables are dependent.


Perform the indicated chi-square independence test by performing the steps below.

(a) Identify the claim and state H0 and Ha.

(b) Determine the degrees of freedom, find the critical value, and identify the rejection region.

(c) Find the chi-square test statistic.

(d) Decide whether to reject or fail to reject the null hypothesis.

(e) Interpret the decision in the context of the original claim.


Data from Exercise 9:

Preference Bank employee New procedure Old procedure 351 No preference Teller 92 50 Customer service representative 76 4

Preference Bank employee New procedure Old procedure 351 No preference Teller 92 50 Customer service representative 76 42

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