condition mean min max ZT0-3 0.991165 0.991165 0.991165 ZT4-7 0.5670094999999999 0.5670094999999999 0.5670094999999999 ZT8-11 0.21129 0.21129 0.21129 ZT12-15 0.0 0.0 0.0 ZT16-19 0.32244833333333334 0.32244833333333334 0.32244833333333334 ZT20-23 0.0 0.0 0.0