condition mean min max ZT0-3 0.06677041675 0.0 0.1335408335 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.14054634049999998 0.125869665 0.155223016 ZT16-19 0.09766618183333334 0.040718081 0.15461428266666666 ZT20-23 0.010402232999999999 0.0 0.020804465999999997