condition mean min max ZT0-3 0.453033 0.4527285 0.4533375 ZT4-7 0.0 0.0 0.0 ZT8-11 3.191405 3.191405 3.191405 ZT12-15 0 0 0 ZT16-19 1.78798 1.78798 1.78798 ZT20-23 0.0 0.0 0.0