5. Consider a case-control study of the possible association between alcohol consumption and the risk of esophageal cancer as reported by \"Tm et al. (1977). The study entailed 200 males diagnosed with esophageal cancer in one of the regional hospitals between the yearsl972 and 1974, and controls were a sample of 775 adult males selected from electoral lists in each community. The data on alcohol consumption dichotomized at a value of 80 g/d for cases and controls are summarized below: Average alcohol consumption (g) Cases Controls Total 380 96 109 205