condition mean min max ZT0-3 32.5708125225 31.459741044999998 33.681884000000004 ZT4-7 9.345892735749999 8.0323326005 10.659452871 ZT8-11 7.1325407315 5.565042482499999 8.7000389805 ZT12-15 9.15975676175 8.3041544885 10.015359035 ZT16-19 13.8923475425 12.18648378 15.598211305 ZT20-23 16.0094739125 15.582016085 16.43693174