condition mean min max ZT0-3 40.236924512499996 28.551780115 51.92206891 ZT4-7 17.95789706 16.593255385 19.322538735000002 ZT8-11 29.718894605 25.068565454999998 34.369223755 ZT12-15 26.622631454999997 23.274134019999998 29.97112889 ZT16-19 31.410720067499998 27.14436549 35.677074645 ZT20-23 38.2766325825 37.343854379999996 39.209410785