condition mean min max ZT0-3 0.9406909999999999 0.9406909999999999 0.9406909999999999 ZT4-7 0.33204100000000003 0.33204100000000003 0.33204100000000003 ZT8-11 0.909139 0.909139 0.909139 ZT12-15 1.104645 1.104645 1.104645 ZT16-19 2.16568 2.16568 2.16568 ZT20-23 1.2501449999999998 1.2501449999999998 1.2501449999999998