condition mean min max ZT0-3 52.0412 52.0412 52.0412 ZT4-7 57.225 57.225 57.225 ZT8-11 41.2149 41.2149 41.2149 ZT12-15 34.812799999999996 34.812799999999996 34.812799999999996 ZT16-19 42.7034 42.7034 42.7034 ZT20-23 44.04365 44.04365 44.04365