condition mean min max ZT0-3 49.3 49.3 49.3 ZT4-7 37.5 37.5 37.5 ZT8-11 53.55 53.55 53.55 ZT12-15 32.15 32.15 32.15 ZT16-19 64.0 64.0 64.0 ZT20-23 40.400000000000006 40.400000000000006 40.400000000000006