Question: In a clinical trial of the effectiveness of echinacea for

In a clinical trial of the effectiveness of echinacea for preventing colds, the results in the table below were obtained. Use a 0.05 significance level to test the claim that getting a cold is independent of the treatment group. What do the results suggest about the effectiveness of echinacea as a prevention against colds? Test the given claim.

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  • CreatedMay 03, 2015
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