condition mean min max ZT0-3 4.8 4.8 4.8 ZT4-7 2.0 2.0 2.0 ZT8-11 43.95 43.95 43.95 ZT12-15 42.15 42.15 42.15 ZT16-19 38.15 38.15 38.15 ZT20-23 47.650000000000006 47.650000000000006 47.650000000000006