condition mean min max ZT0-3 1802.1999999999998 1802.1999999999998 1802.1999999999998 ZT4-7 1173.2 1173.2 1173.2 ZT8-11 1309.85 1309.85 1309.85 ZT12-15 1267.15 1267.15 1267.15 ZT16-19 1556.9 1556.9 1556.9 ZT20-23 1749.75 1749.75 1749.75