condition mean min max ZT0-3 1316.55 1316.55 1316.55 ZT4-7 943.4 943.4 943.4 ZT8-11 888.5 888.5 888.5 ZT12-15 1189.85 1189.85 1189.85 ZT16-19 1393.1999999999998 1393.1999999999998 1393.1999999999998 ZT20-23 1576.5 1576.5 1576.5