condition mean min max ZT0-3 517.05 517.05 517.05 ZT4-7 501.3 501.3 501.3 ZT8-11 575.3 575.3 575.3 ZT12-15 691.7 691.7 691.7 ZT16-19 493.95 493.95 493.95 ZT20-23 581.75 581.75 581.75