condition mean min max ZT0-3 0.7095883333333334 0.0 2.128765 ZT4-7 0.689025 0.689025 0.689025 ZT8-11 0.0 0.0 0.0 ZT12-15 0.7539575 0.0 1.507915 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0