condition mean min max ZT0-3 47.661833333333334 44.97 52.444 ZT4-7 45.019 45.019 45.019 ZT8-11 45.37935 45.37935 45.37935 ZT12-15 39.216325 38.01455 40.418099999999995 ZT16-19 39.48965 39.48965 39.48965 ZT20-23 31.11625 31.11625 31.11625