condition mean min max ZT0-3 72.6 72.6 72.6 ZT4-7 30.5 30.5 30.5 ZT8-11 36.05 36.05 36.05 ZT12-15 44.3 44.3 44.3 ZT16-19 42.75 42.75 42.75 ZT20-23 49.650000000000006 49.650000000000006 49.650000000000006