condition mean min max ZT0-3 9.40667738625 6.709119358 12.1042354145 ZT4-7 26.287146092500002 24.03884283 28.535449355 ZT8-11 19.67916283725 16.4466127245 22.911712950000002 ZT12-15 25.58695313 25.32337304 25.850533220000003 ZT16-19 18.490492924999998 15.933020695 21.047965155 ZT20-23 12.666802425250001 11.104597270500001 14.229007580000001