condition mean min max ZT0-3 10.527188333333333 8.093634999999999 14.4052 ZT4-7 3.7489049999999997 3.7489049999999997 3.7489049999999997 ZT8-11 2.131025 2.131025 2.131025 ZT12-15 8.754525000000001 3.745445 13.763605 ZT16-19 10.560465 10.560465 10.560465 ZT20-23 11.391169999999999 11.391169999999999 11.391169999999999