condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.008627096833333332 0.0 0.017254193666666664 ZT8-11 0.009616586 0.0 0.019233172 ZT12-15 0.0 0.0 0.0 ZT16-19 0.014952577833333333 0.0 0.029905155666666666 ZT20-23 0.007045195999999999 0.0 0.014090391999999998