A physician who specializes in weight control has three different diets she recommends. As an experiment, she randomly selected 15 patients and then assigned 5 to each diet. After 3 weeks, the following weight losses in pounds were noted. At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets? PLAN A PLAN B PLAN C 5 6 7 7 7 8 4 7 9 5 5 8 4 6 9 ?ª State the null hypothesis. (.05 point) ?ª State the alternative hypothesis. (.05 point) ?ª Select a level of significance. (.05 point) ?ª Select the test statistic (.05 point) and show the value of the test statistic. ?ª Formulate the decision rule. (.05 point) ?ª Make a decision. (.05 point). When stating your decision, state the value of the tables critical value and compare it with your obtained value.
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