These data show the SKIP -- the distance the ball traveled or bounced from the TARGET slot. The target slot is the slot, or pocket on the wheel the ball would have hit (from observation), if it had not skipped. The skip is due to the ball hitting the divider between pockets and because of bouncing off the "diamonds" on the stationary part of the wheel.
N=67. The unit of 'distance' is the number of pockets on the wheel.