condition mean min max ZT0-3 0.63005675 0.50346 0.7566535 ZT4-7 0.2568395 0.2568395 0.2568395 ZT8-11 0.505974 0.505974 0.505974 ZT12-15 0 0 0 ZT16-19 0.7446470000000001 0.7446470000000001 0.7446470000000001 ZT20-23 0.4965125 0.4965125 0.4965125