condition mean min max ZT0-3 1020.8499999999999 1020.8499999999999 1020.8499999999999 ZT4-7 1549.6 1549.6 1549.6 ZT8-11 1507.4 1507.4 1507.4 ZT12-15 1615.35 1615.35 1615.35 ZT16-19 1583.7 1583.7 1583.7 ZT20-23 1209.15 1209.15 1209.15