condition mean min max ZT0-3 0.0077657 0.0077657 0.0077657 ZT4-7 0.0215795 0.0215795 0.0215795 ZT8-11 0.034199 0.034199 0.034199 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0