condition mean min max ZT0-3 144.05 144.05 144.05 ZT4-7 128.9 128.9 128.9 ZT8-11 134.5 134.5 134.5 ZT12-15 145.45 145.45 145.45 ZT16-19 211.5 211.5 211.5 ZT20-23 190.9 190.9 190.9