condition mean min max ZT0-3 158.95 158.95 158.95 ZT4-7 104.2 104.2 104.2 ZT8-11 57.25 57.25 57.25 ZT12-15 116.3 116.3 116.3 ZT16-19 131.75 131.75 131.75 ZT20-23 144.8 144.8 144.8