condition mean min max ZT0-3 4.80247 4.80247 4.80247 ZT4-7 2.24759 2.24759 2.24759 ZT8-11 2.618355 2.618355 2.618355 ZT12-15 4.8108 4.8108 4.8108 ZT16-19 10.082175 10.082175 10.082175 ZT20-23 6.954525 6.954525 6.954525