3.Chi-Squared Test of Independence

Tests for the adverse reactions to a new drug yielded the results given in the table.At the 0.05 significance level, test the claim that the treatment is independent of the reaction (headache or no headache experienced).

DrugPlacebo

Headache117

No headache7391

Hypothesis

Ho:

Ha:

Expected Values

Decision

Conclusion

4.Perform the indicated Goodness of Fit Test.Using the data below and a 0.05 significance level, test the claim that the responses occur with percentages of 15%, 20%, 25%, 25%, and 15% respectfully.

ResponseABCDE

Frequency1215161819

Hypothesis

Ho:

Ha:

ExpectedValues

Decision