condition mean min max ZT0-3 135.4 135.4 135.4 ZT4-7 160.6 160.6 160.6 ZT8-11 85.4 85.4 85.4 ZT12-15 77.75 77.75 77.75 ZT16-19 32.65 32.65 32.65 ZT20-23 82.3 82.3 82.3