condition mean min max ZT0-3 0.026459316666666666 0.0 0.04098375 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03950055 0.03950055 0.03950055 ZT12-15 0.021487875 0.0 0.04297575 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0