condition mean min max ZT0-3 1211.25 1211.25 1211.25 ZT4-7 765.2 765.2 765.2 ZT8-11 1018.5999999999999 1018.5999999999999 1018.5999999999999 ZT12-15 2583.75 2583.75 2583.75 ZT16-19 2592.75 2592.75 2592.75 ZT20-23 1350.75 1350.75 1350.75