condition mean min max ZT0-3 19.211102500750002 11.698380001499999 26.723825 ZT4-7 21.0550934375 17.236148455 24.874038419999998 ZT8-11 22.1659018175 21.942253434999998 22.389550200000002 ZT12-15 7.3460070242499995 3.1784144195 11.513599629 ZT16-19 3.89004142225 3.0522679085 4.727814936 ZT20-23 4.27834285175 3.4045138584999997 5.152171845