condition mean min max ZT0-3 1.2511450000000002 1.2511450000000002 1.2511450000000002 ZT4-7 1.1908345 1.1908345 1.1908345 ZT8-11 2.47586 2.47586 2.47586 ZT12-15 2.354655 2.354655 2.354655 ZT16-19 0.6933715 0.6933715 0.6933715 ZT20-23 1.888245 1.888245 1.888245