condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0322459 0.0322459 0.0322459 ZT8-11 0.05989493333333334 0.05989493333333334 0.05989493333333334 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0