A psychologist at a private psychiatric hospital was asked to determine whether there was any clear difference in the length of stay of patients with different types diagnoses. Looking at the last four patients in each of the three major psychological disorder categories. Using the 0.05 alpha level and all the steps of hypothesis testing, is there a significant difference in length of stay among the diagnosis categories? Number of weeks in a psychiatric hospital by type of psychological disorder. PSYCHOLOGICAL DISORDERS Affective Disorders 7 6 5 6 Cognitive Disorders 12 8 9 11 Substance Use Disorders 8 10 12 10

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