A Clinical Psychologist Wants to Know If There Is Any

Essay

A clinical psychologist wants to know if there is any difference in the age of onset of paranoid schizophrenia, simple schizophrenia, or catatonic schizophrenia. The psychologist does a chart review and records the age of diagnosis for random samples of patients with the above diagnoses.
a. Is there any difference in the age of onset for these three types of schizophrenia? (use a = 0.01).
b. Make all post hoc pairwise comparisons possible, using a = 0.01 and the Scheffé test.