condition mean min max ZT0-3 38.95 38.95 38.95 ZT4-7 15.9 15.9 15.9 ZT8-11 35.55 35.55 35.55 ZT12-15 44.9 44.9 44.9 ZT16-19 45.900000000000006 45.900000000000006 45.900000000000006 ZT20-23 42.35 42.35 42.35