condition mean min max ZT0-3 72.09756327 49.15764789 95.03747865 ZT4-7 145.39371724999998 126.357691 164.42974349999997 ZT8-11 87.06719542 60.18103518 113.95335566 ZT12-15 5.91089553025 0.056822146 11.7649689145 ZT16-19 0.05452772325 0.0 0.1090554465 ZT20-23 0.08371089375 0.0451367375 0.12228505