Problem 4: A research group wishes to determine the relationship between a pitcher's fastball velocity and the forces generated against the ground during the throw. They monitor ball velocity (VEL), horizontal force from the rear foot (RY), vertical force from the rear foot (RZ), horizontal force from the front foot (FY), and vertical force from the front foot (FZ). The following represents results from the first six subjects.

Data file in Excel 5.0 worksheet
Data file in Statistica spreadsheet
 
VEL RY RZ FY FZ
80 120 185 135 210
75 115 192 120 190
85 115 190 143 220
70 105 180 111 200
65 102 175 110 190
90 122 205 140 240