condition mean min max ZT0-3 25.75327 10.29436 33.5222 ZT4-7 7.232145000000001 7.232145000000001 7.232145000000001 ZT8-11 14.10935 14.10935 14.10935 ZT12-15 37.75575 27.75375 47.75775 ZT16-19 51.4552 51.4552 51.4552 ZT20-23 48.948449999999994 48.948449999999994 48.948449999999994