Question: Many people believe that fatal DWI crashes occur because of casual drinkers who tend to binge on Friday and Saturday nights; whereas others believe that people who drink every day of the week cause DWI crashes. In a study of fatal car crashes, 216 cases are randomly selected from the pool in which the driver was found to have a blood alcohol level over 0.10. These cases are broken down according to the day of the week, with the results listed in the accompanying table. At a 0.05 significance level, test the claim that fatal crashes involving individuals with a blood alcohol level over 0.10 occur on different days of the week with equal frequency. Does the evidence support the theory that fatal DWI car crashes are due to casual drinkers or do those who drink daily cause them?

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