condition mean min max ZT0-3 3040.8 3040.8 3040.8 ZT4-7 2388.8 2388.8 2388.8 ZT8-11 1744.15 1744.15 1744.15 ZT12-15 937.5999999999999 937.5999999999999 937.5999999999999 ZT16-19 600.0 600.0 600.0 ZT20-23 1492.35 1492.35 1492.35