condition mean min max ZT0-3 45.054199999999994 45.054199999999994 45.054199999999994 ZT4-7 11.381365 11.381365 11.381365 ZT8-11 19.310299999999998 19.310299999999998 19.310299999999998 ZT12-15 276.0645 276.0645 276.0645 ZT16-19 255.9875 255.9875 255.9875 ZT20-23 136.4275 136.4275 136.4275