condition mean min max ZT0-3 1.1871288333333334 0.3983715 1.916635 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1363745 0.1363745 0.1363745 ZT12-15 0.0 0.0 0.0 ZT16-19 0.391845 0.391845 0.391845 ZT20-23 1.022401 1.022401 1.022401