If you would like to see how much luckier one team is than the other use this formula:
C is the difference in luck between Team 1 and Team 2. Example, St. Louis and NY Islanders:Team 1's Z value - Team 2's Z value = A
A / Team 1's Z = B
B * 100 = C
So, St. Louis was 20% luckier than NY Islanders. Obviously this formula doesn't account for injuries or player acquisitions.3.833 - 3.048 = 0.785
0.785 / 3.833 = 0.2048004174276024
0.242520518930368 * 100 = 20.48004174276024
Edit: updated STL's numbers.