condition mean min max ZT0-3 38.25 38.25 38.25 ZT4-7 54.2 54.2 54.2 ZT8-11 51.95 51.95 51.95 ZT12-15 73.15 73.15 73.15 ZT16-19 82.95 82.95 82.95 ZT20-23 46.650000000000006 46.650000000000006 46.650000000000006