condition mean min max ZT0-3 47.3 47.3 47.3 ZT4-7 55.5 55.5 55.5 ZT8-11 54.3 54.3 54.3 ZT12-15 47.05 47.05 47.05 ZT16-19 47.15 47.15 47.15 ZT20-23 38.650000000000006 38.650000000000006 38.650000000000006