Question: References about this question: Basic Logic of the Analysis of Variance; Carrying Out an Analysis of Variance; Hypothesis Testing with the Analysis of Variance; Assumptions
References about this question: Basic Logic of the Analysis of Variance; Carrying Out an Analysis of Variance; Hypothesis Testing with the Analysis of Variance; Assumptions in the Analysis of Variance; Effect Size and Power for the Analysis of Variance; Factorial Analysis of Variance; Recognizing and Interpreting Interaction Effects; Analysis of Variance in Research Articles
Question: A team of Psychologists designed a study in which 12 Psychiatric patients diagnosed as having generalized anxiety disorder were randomly assigned to one of three new types of therapy, here labeled X, Y, and Z. One year after therapy, the patient's overall mental health scores were as follows:

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