condition mean min max ZT0-3 0.02570985 0.02570985 0.02570985 ZT4-7 0.0298933 0.0298933 0.0298933 ZT8-11 0.01634515 0.01634515 0.01634515 ZT12-15 0.0 0.0 0.0 ZT16-19 0.06570485000000001 0.06570485000000001 0.06570485000000001 ZT20-23 0.0261147 0.0261147 0.0261147