condition mean min max ZT0-3 0.021335033333333333 0.0 0.04994545 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.162117225 0.103878 0.22035645 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0354959 0.0354959 0.0354959