condition mean min max ZT0-3 450.7 450.7 450.7 ZT4-7 360.2 360.2 360.2 ZT8-11 400.8 400.8 400.8 ZT12-15 480.4 480.4 480.4 ZT16-19 373.8 373.8 373.8 ZT20-23 410.25 410.25 410.25