condition mean min max ZT0-3 31.4 31.4 31.4 ZT4-7 93.2 93.2 93.2 ZT8-11 101.8 101.8 101.8 ZT12-15 50.3 50.3 50.3 ZT16-19 58.15 58.15 58.15 ZT20-23 55.75 55.75 55.75