condition mean min max ZT0-3 937.9000000000001 937.9000000000001 937.9000000000001 ZT4-7 1105.8 1105.8 1105.8 ZT8-11 999.3 999.3 999.3 ZT12-15 848.2 848.2 848.2 ZT16-19 575.25 575.25 575.25 ZT20-23 697.95 697.95 697.95