condition mean min max ZT0-3 0.44776750000000004 0.348368 0.5415840000000001 ZT4-7 0.514429 0.514429 0.514429 ZT8-11 0.358452 0.358452 0.358452 ZT12-15 0.3597305 0.174632 0.544829 ZT16-19 0.7678265 0.7678265 0.7678265 ZT20-23 0.859149 0.859149 0.859149