condition mean min max ZT0-3 18.750875 16.8398 20.66195 ZT4-7 24.291249999999998 24.291249999999998 24.291249999999998 ZT8-11 22.419649999999997 22.419649999999997 22.419649999999997 ZT12-15 0 0 0 ZT16-19 24.1664 24.1664 24.1664 ZT20-23 28.6647 28.6647 28.6647