condition mean min max ZT0-3 619.75 619.75 619.75 ZT4-7 787.0 787.0 787.0 ZT8-11 805.4000000000001 805.4000000000001 805.4000000000001 ZT12-15 776.55 776.55 776.55 ZT16-19 798.8 798.8 798.8 ZT20-23 713.9 713.9 713.9