A clinical psychologist noticed that several of his manic psychotic patients did chicken impersonations in public. He wondered whether this behaviour could be used to diag- nose this disorder and so decided to compare his patients against a normal sample. He observed 10 of his patients as they went through a normal day. He also needed to observe 10 of the most normal people he could find: naturally he chose to observe lecturers at the University of Sussex. He measured all participants using two dependent variables: first, how many chicken impersonations they did in the streets of Brighton over the course of a day, and second, how good their impersonations were (as scored out of 10 by an independent farmyard noise expert). The data are in the file chicken.sav; use MANOVA and DFA to find out whether these variables could be used to distinguish manic psychotic patients from those without the disorder.3