condition mean min max ZT0-3 0.49094483333333333 0.2682545 0.6359445 ZT4-7 0.5113099999999999 0.5113099999999999 0.5113099999999999 ZT8-11 0.579445 0.579445 0.579445 ZT12-15 0.5498002500000001 0.48669300000000004 0.6129075 ZT16-19 0.1490305 0.1490305 0.1490305 ZT20-23 0.459287 0.459287 0.459287