condition mean min max ZT0-3 0.02259525 0.0 0.051015450000000004 ZT4-7 0.0632896 0.0632896 0.0632896 ZT8-11 0.0 0.0 0.0 ZT12-15 0.066061275 0.0646975 0.06742505 ZT16-19 0.1381845 0.1381845 0.1381845 ZT20-23 0.01704105 0.01704105 0.01704105