condition mean min max ZT0-3 1064.6 1064.6 1064.6 ZT4-7 1506.1 1506.1 1506.1 ZT8-11 1632.9499999999998 1632.9499999999998 1632.9499999999998 ZT12-15 1581.55 1581.55 1581.55 ZT16-19 1104.7 1104.7 1104.7 ZT20-23 911.6 911.6 911.6