condition mean min max ZT0-3 43.2 43.2 43.2 ZT4-7 10.7 10.7 10.7 ZT8-11 12.600000000000001 12.600000000000001 12.600000000000001 ZT12-15 11.0 11.0 11.0 ZT16-19 79.0 79.0 79.0 ZT20-23 46.400000000000006 46.400000000000006 46.400000000000006