condition mean min max ZT0-3 0.0329708 0.0329708 0.0329708 ZT4-7 0.04162525 0.04162525 0.04162525 ZT8-11 0.08527404999999999 0.08527404999999999 0.08527404999999999 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.00909095 0.00909095 0.00909095