A medical association monitoring two groups of physicians who agreed to participate in a study over a 7-year period found that, of 3420 physicians who took aspirin daily, 147 died from a stroke or heart attack during this period. For 1705 physicians who received a placebo instead of aspirin, 78 deaths were recorded. At the 0.01 level of significance, does the study indicate that taking aspirin is beneficial in reducing the likelihood of a stroke or heart attack?