condition mean min max ZT0-3 1.40402 1.40402 1.40402 ZT4-7 0.25986200000000004 0.25986200000000004 0.25986200000000004 ZT8-11 2.306345 2.306345 2.306345 ZT12-15 1.802025 1.802025 1.802025 ZT16-19 2.5228650000000004 2.5228650000000004 2.5228650000000004 ZT20-23 2.08648 2.08648 2.08648