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Example 179

 

Example 179: At the 1% significance level, test the claim that drinking habits and congestive heart failure are independent.

   Alcohol Consumption

                                      Abstainers    Less than 7 drinks    7 or more drinks

Congestive

Heart Failure    Yes         146                     106                              29

                             No         750                     590                             292

                            Totals    896                     696                             321

 

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