condition mean min max ZT0-3 162.7 162.7 162.7 ZT4-7 135.2 135.2 135.2 ZT8-11 108.6 108.6 108.6 ZT12-15 160.7 160.7 160.7 ZT16-19 175.75 175.75 175.75 ZT20-23 170.3 170.3 170.3