condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.050316 0.050316 0.050316 ZT12-15 0.03770216666666667 0.0 0.07540433333333334 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0