condition mean min max ZT0-3 1410.75 1410.75 1410.75 ZT4-7 1217.9 1217.9 1217.9 ZT8-11 1082.85 1082.85 1082.85 ZT12-15 1115.05 1115.05 1115.05 ZT16-19 1226.6999999999998 1226.6999999999998 1226.6999999999998 ZT20-23 1321.5 1321.5 1321.5