condition mean min max ZT0-3 0.3936583333333334 0.0 1.180975 ZT4-7 0.0 0.0 0.0 ZT8-11 0.231397 0.231397 0.231397 ZT12-15 0.2567375 0.0 0.513475 ZT16-19 0.67305 0.67305 0.67305 ZT20-23 0.993878 0.993878 0.993878