In an investigation of alcohol use among college students, each male student in a sample was categorized both according to age group and according to the number of heavy drinking episodes during the previous 30 days ("Alcohol Use in Students Seeking Primary Care Treatment at University Health Services," J. of Amer. College Health, 2012: 217-225).

Does there appear to be an association between extent of binge drinking and age group in the population from which the sample was selected? Carry out a test of hypotheses at significance level .01.

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Age Group 18-20 21-23 24 357 218 184 328 None 1-2 293 592 285 3 218 185 331 354 # Episodes 25 147