condition mean min max ZT0-3 0.03210551266666667 0.030105386999999997 0.034105638333333334 ZT4-7 0.0 0.0 0.0 ZT8-11 0.018272771 0.0 0.036545542 ZT12-15 0.0211445225 0.0 0.042289045 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0