Abstract: A statistical analysis package for a bowling center system provides displays used to analyze bowling ball trajectories. The bowling center system includes a central processing unit having a memory and connected to a ball trajectory unit. The ball trajectory unit generates information representing the trajectory of a bowling ball in a lane which is stored in the processing unit memory. The processing unit memory is operable in response to a user request for selecting trajectory information to develop statistical graphs illustrating historical tendencies at a select trajectory position for display on a monitor.