condition mean min max ZT0-3 620.52325 595.0889999999999 645.9575 ZT4-7 484.93100000000004 484.93100000000004 484.93100000000004 ZT8-11 310.6865 310.6865 310.6865 ZT12-15 0 0 0 ZT16-19 514.5015 514.5015 514.5015 ZT20-23 558.8025 558.8025 558.8025