condition mean min max ZT0-3 434.232057 434.232057 434.232057 ZT4-7 703.9482495 703.9482495 703.9482495 ZT8-11 649.6946175 649.6946175 649.6946175 ZT12-15 619.1363735 619.1363735 619.1363735 ZT16-19 442.263034 442.263034 442.263034 ZT20-23 372.3660085 372.3660085 372.3660085