condition mean min max ZT0-3 30.95 30.95 30.95 ZT4-7 28.3 28.3 28.3 ZT8-11 21.75 21.75 21.75 ZT12-15 8.45 8.45 8.45 ZT16-19 32.05 32.05 32.05 ZT20-23 44.900000000000006 44.900000000000006 44.900000000000006