condition mean min max ZT0-3 0.027209999999999998 0.027209999999999998 0.027209999999999998 ZT4-7 0.050735333333333334 0.050735333333333334 0.050735333333333334 ZT8-11 0.025979000000000002 0.025979000000000002 0.025979000000000002 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0