condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03654835 0.03654835 0.03654835 ZT8-11 0.038506 0.038506 0.038506 ZT12-15 0.038386 0.0 0.076772 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04044285 0.04044285 0.04044285