condition mean min max ZT0-3 17.5559 17.5559 17.5559 ZT4-7 12.34225 12.34225 12.34225 ZT8-11 17.878149999999998 17.878149999999998 17.878149999999998 ZT12-15 12.07235 12.07235 12.07235 ZT16-19 23.4585 23.4585 23.4585 ZT20-23 19.2926 19.2926 19.2926