condition mean min max ZT0-3 1.2869294627499999 1.157014494 1.4168444315 ZT4-7 1.5404750542499999 1.3099229829999999 1.7710271254999999 ZT8-11 2.0559518917500004 1.4615140885 2.6503896950000003 ZT12-15 2.78684095775 2.286480097 3.2872018185 ZT16-19 1.77055849775 1.6213606624999999 1.919756333 ZT20-23 3.324484498 3.138032975 3.510936021