condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03856645 0.03856645 0.03856645 ZT8-11 0.01990895 0.01990895 0.01990895 ZT12-15 0 0 0 ZT16-19 0.11563105 0.11563105 0.11563105 ZT20-23 0.03868695 0.03868695 0.03868695