condition mean min max ZT0-3 19.65 19.65 19.65 ZT4-7 32.1 32.1 32.1 ZT8-11 30.95 30.95 30.95 ZT12-15 18.5 18.5 18.5 ZT16-19 29.9 29.9 29.9 ZT20-23 60.900000000000006 60.900000000000006 60.900000000000006