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QUESTION 9 A researcher wishes to determine whether there is a difference in the average age of middle school, high school, and college teachers. Teachers are randomly selected. Their ages are recorded below. Use a = 0.01. Which of the following is a correct statement about the means? Middle School High School College Teachers Teachers Teachers 23 41 39 28 38 45 27 36 45 25 47 61 52 42 36 37 31 35 There is not enough evidence to suggest that the means are different. The mean age of middle school teachers is different from the mean age of high school teachers. The mean age of middle school teachers is different from the mean age of college teachers. O The mean age of high school teachers is different from the mean age of college teachers. QUESTION 10 Researchers wanted to determine if the psychological profile of healthy children was different than that for children suffering from recurrent abdominal pain (RAP) or recurring headaches. Results of the study are summarized in the following table. Determine which pairwise means of the three treatment groups, if any, are different using a familywise error rate of alpha = 0.05. Sample Mean Sample Variance control group 70 11.7 21.6 RAP 70 9.0 13.0 headache 70 12.4 84 O There is not enough evidence to suggest that the means are different. O The mean score of the Control Group is different from the mean score of the RAP group. O The mean score of the Control Group is different from the mean score of the headache group. The mean scores of each pairwise group are different