condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.07181819299999999 0.0 0.14363638599999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.04164567933333334 0.0 0.08329135866666668 ZT20-23 0.6681477498333334 0.0 1.3362954996666667