condition mean min max ZT0-3 38.6 38.6 38.6 ZT4-7 49.7 49.7 49.7 ZT8-11 24.9 24.9 24.9 ZT12-15 42.0 42.0 42.0 ZT16-19 33.45 33.45 33.45 ZT20-23 39.900000000000006 39.900000000000006 39.900000000000006