condition mean min max ZT0-3 14.963206979999999 14.07751634 15.848897619999999 ZT4-7 20.558065590000002 20.22372559 20.892405590000003 ZT8-11 14.265514125 12.993657970000001 15.53737028 ZT12-15 10.3920304285 10.217242416000001 10.566818441 ZT16-19 16.472700575 14.72391552 18.22148563 ZT20-23 29.2109768625 23.187676545000002 35.23427718