condition mean min max ZT0-3 1.7981794785 1.515972815 2.080386142 ZT4-7 3.64721480525 3.2851252750000004 4.0093043354999995 ZT8-11 3.41827889825 3.050375054 3.7861827425000003 ZT12-15 2.9337219649999997 2.6920311784999997 3.1754127514999997 ZT16-19 3.2951437660000003 2.4037735595000003 4.1865139725 ZT20-23 8.262998730500001 5.6538880855 10.872109375500001