condition mean min max ZT0-3 184.4 184.4 184.4 ZT4-7 324.9 324.9 324.9 ZT8-11 570.8 570.8 570.8 ZT12-15 451.35 451.35 451.35 ZT16-19 232.8 232.8 232.8 ZT20-23 130.85 130.85 130.85