condition mean min max ZT0-3 101.167971 101.167971 101.167971 ZT4-7 104.2328065 104.2328065 104.2328065 ZT8-11 101.49013149999999 101.49013149999999 101.49013149999999 ZT12-15 102.0520365 102.0520365 102.0520365 ZT16-19 102.443037 102.443037 102.443037 ZT20-23 97.697851 97.697851 97.697851