condition mean min max ZT0-3 51.507636107500005 20.840526135 82.17474608 ZT4-7 21.557170045 17.561312595 25.553027495000002 ZT8-11 41.7042776825 32.83343994 50.575115425 ZT12-15 43.029730369999996 37.59274118 48.46671956 ZT16-19 32.2425046575 31.522476049999998 32.962533265 ZT20-23 34.115493775 34.01418898 34.216798569999995