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4. The weighted mean Aa Aa The leader of two postpartum womens support groups is interested in the depression levels of the women in her groups. She administers the Center for Epidemiologic Studies Depression Scale (CES-D) screening test to the members of her groups. The CES-D is a 20-question self-test that measures depressive feelings and behaviors during the previous week. The mean depression level from the screening test for the 12 women in the first group is μ 1-15; the mean depression level for the 8 women in the second group is H2 11 Without calculating the weighted mean for the combined group, you know that the weighted mean is: Closer to 15 than to 11 O Midway between 15 and 11 Closer to 11 than to 15 Compute the weighted mean. Enter your answer rounded to one decimal place. The support group leader realizes that she should also screen for alcohol abuse, so she gives the women in her two groups the Michigan Alcohol Screening Test (MAST). The MAST is a 22-question self-test focusing on the use and abuse of alcohol. The first group has a mean score of μι 16. The second group has a mean score of μ2 18 Compute the weighted mean. Enter your answer rounded to one decimal place

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e Mean de Preeéien Scnge v the 12 wmon in the depressten adt.the 8 wo rer.the Cmpate the weighted Htean =HÁg)+849-150) +n@) 3. * Te bek gouphy, a mean score I. The con up o a Hean.12+8

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