condition mean min max ZT0-3 5.43726 5.3023050000000005 5.572215 ZT4-7 2.9075699999999998 2.9075699999999998 2.9075699999999998 ZT8-11 0.8027469999999999 0.8027469999999999 0.8027469999999999 ZT12-15 0 0 0 ZT16-19 3.9579649999999997 3.9579649999999997 3.9579649999999997 ZT20-23 4.290175 4.290175 4.290175