condition mean min max ZT0-3 0.10852308425 0.055142197999999996 0.1619039705 ZT4-7 1.18468256575 0.5832133825 1.786151749 ZT8-11 1.57371860775 1.5153897560000003 1.6320474594999999 ZT12-15 7.34396605575 3.22245766 11.4654744515 ZT16-19 13.490507842500001 11.919695345000001 15.06132034 ZT20-23 18.400227845000003 18.19954573 18.600909960000003