x I J. A small study {11:10] is designed to assess if there is an association between smoking in pregnancy and low birth weight. Low birth weight babies are those born less than 5.5 pounds. The following data represent the birth weights, in pounds, of babies born to mothers who reported smoking in pregnancy and those who did not. Mother smoked in pregnancy 5.0 4.2 4.8 3.3 3.9 Mother did not smoke during pregnancy 5.1 4.9 5.3 5.4 4.6 Is there a significant difference in birth weights between mother who smoked during pregnancy and those who did not? Run the appropriate test at a 5% level of significance. Step 1. Set up hypotheses and determine level of significance. Hg: The populations of birth weights in mothers who smoked in pregnancy and those who did not are equal H1: The populations of birth weights in mothers who smoked in pregnancy and those who did not are not equal [=0.05 Step 2. Select the appropriate test statistic. The test statistic for the Mann "Whitney U Test is U. Step 3. Set up decision rule