condition mean min max ZT0-3 0.8502483333333334 0.0 1.810075 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.317245 0.0 0.63449 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0