condition mean min max ZT0-3 0.11716275 0.0 0.2343255 ZT4-7 0.234478 0.234478 0.234478 ZT8-11 0.5919165 0.5919165 0.5919165 ZT12-15 0 0 0 ZT16-19 0.8058624999999999 0.8058624999999999 0.8058624999999999 ZT20-23 0.3465265 0.3465265 0.3465265