condition mean min max ZT0-3 0.42509745 0.18076685 0.671631 ZT4-7 0.40397000000000005 0.40397000000000005 0.40397000000000005 ZT8-11 0.6362935000000001 0.6362935000000001 0.6362935000000001 ZT12-15 0.680539 0.536522 0.8245560000000001 ZT16-19 1.0901525 1.0901525 1.0901525 ZT20-23 0.681643 0.681643 0.681643