A psychologist studying addictions investigated the effectiveness of three different treatments for alcoholism on the number of strong urges to drink alcohol that were experienced at the end of treatment. He compared three treatments: (1) Alcoholics Anonymous, (2) Individual psychotherapy, and (3) A medication that is supposed to reduce urges. He matched 30 alcoholics into groups of three based on the severity of their addiction and then randomly assigned them to the three different treatments. (Each person assigned to Alcoholics Anonymous attended a different group.) At the end of treatment, he had the participants keep a diary of how many strong urges to drink alcohol they experienced each day. Here are the results:

Given SS_Subjects = 532.00, SS_Treatment = 26.67, and SS_Residual = 88.00, complete the appropriate statistical test and interpret the results. (Don€™t forget to follow all six steps of the hypothesis test.)

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Individual Anonymous Psychotherapy Medication 6.00 4.52 Alcoholics 8.00 6.00 4.37 5.42