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1. MEDICINE Explain whether the conclusion presented in the following report is valid.New Drug Helps AcneA new drug helps people who have acne breakouts. A random sample of 1,200 patients who have moderate tosevere acne was randomly split into two equal groups. One group tried the new acne medication, taking it twicedaily, once in the morning, and once in the evening. The other group was given a placebo to use in the sameway. After nine months, members of the group that tried the new drug reported 60% clearer skin than membersof the group that used the placebo.