condition mean min max ZT0-3 774.9 774.9 774.9 ZT4-7 869.8 869.8 869.8 ZT8-11 674.3 674.3 674.3 ZT12-15 647.4 647.4 647.4 ZT16-19 775.85 775.85 775.85 ZT20-23 782.2 782.2 782.2