A research wants to study how well the performance on graduate comprehensive exams and systolic blood pressure can be predicted from motivation, qualification for admissions to graduate training , performance in graduate course, and anxiety combined . The research has collected scores for six students on four independent variables : a measure of professional motivation (MOTIV) , a composite rating of qualifications for admissions to graduate training (QUAL) , a composite rating of performance in graduate course (GRADE), and anxiety (ANXI) . Two dependent variables are the rating of performance on graduate comprehensive exams (COMPR) and systolic blood pressure (SBP) . The data are shown in Table 6.6 . Assume that the data are from multivariate normal distributions.