condition mean min max ZT0-3 0.05365048333333333 0.0389084 0.0830655 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.62616225 0.6235165 0.628808 ZT16-19 0.1538275 0.1538275 0.1538275 ZT20-23 0.0422032 0.0422032 0.0422032