condition mean min max ZT0-3 0.444058 0.444058 0.444058 ZT4-7 0.1846285 0.1846285 0.1846285 ZT8-11 0.1590145 0.1590145 0.1590145 ZT12-15 0.3833005 0.3833005 0.3833005 ZT16-19 1.356945 1.356945 1.356945 ZT20-23 0.7693814999999999 0.7693814999999999 0.7693814999999999