condition mean min max ZT0-3 0.0023672855 0.0 0.004734571 ZT4-7 0.0123024235 0.010380337 0.01422451 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0210879195 0.014338403999999999 0.027837435 ZT16-19 0.026269761000000003 0.01940842 0.033131102 ZT20-23 0.06765354525 0.0646614655 0.07064562499999999