condition mean min max ZT0-3 709.1 709.1 709.1 ZT4-7 773.6 773.6 773.6 ZT8-11 634.75 634.75 634.75 ZT12-15 535.2 535.2 535.2 ZT16-19 830.5 830.5 830.5 ZT20-23 863.2 863.2 863.2