condition mean min max ZT0-3 38.597925000000004 36.84555 40.3503 ZT4-7 40.41985 40.41985 40.41985 ZT8-11 40.9897 40.9897 40.9897 ZT12-15 0 0 0 ZT16-19 43.65925 43.65925 43.65925 ZT20-23 43.6964 43.6964 43.6964