In a study of the effects of drinking and driving, 3 groups of adult men were randomly selected for an experiment designed to measure their blood alcohol levels after consuming 5 drinks. Members of group A were tested after 1 hour, members of group B were tested after 2 hours, and members of group C were tested after 4 hours. The results are given in the accompanying table; the ANOVA table for these data is also shown. At the 0.05 level of significance, test the claim that the 3 groups have the same mean level.

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ANOVA Source of Variation Between groups Within groups Total df MS 0.007657143 0.001142857 0.003829 8.16E-05 46.9 14 0.0088 16