condition mean min max ZT0-3 0.04854455 0.0 0.0970891 ZT4-7 0.0399721 0.0399721 0.0399721 ZT8-11 0.0388117 0.0388117 0.0388117 ZT12-15 0 0 0 ZT16-19 0.0193404 0.0193404 0.0193404 ZT20-23 0.0387991 0.0387991 0.0387991