condition mean min max ZT0-3 0.032022 0.0 0.096066 ZT4-7 0.0291576 0.0291576 0.0291576 ZT8-11 0.42878900000000003 0.42878900000000003 0.42878900000000003 ZT12-15 0.8136265 0.6032215 1.0240315 ZT16-19 0.2654305 0.2654305 0.2654305 ZT20-23 0.03226455 0.03226455 0.03226455