condition mean min max ZT0-3 0.035175304500000004 0.0 0.07035060900000001 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.019591561333333334 0.0 0.03918312266666667 ZT20-23 0.021402436166666663 0.0 0.04280487233333333