condition mean min max ZT0-3 753.3 753.3 753.3 ZT4-7 571.0 571.0 571.0 ZT8-11 645.0 645.0 645.0 ZT12-15 700.9 700.9 700.9 ZT16-19 785.25 785.25 785.25 ZT20-23 716.75 716.75 716.75