condition mean min max ZT0-3 0.33777298875 0.3119433605 0.363602617 ZT4-7 0.53494727075 0.3968430605 0.673051481 ZT8-11 5.033296927 2.9401977475 7.1263961065000005 ZT12-15 21.3027908 14.502009374999998 28.103572225 ZT16-19 31.585221485 30.22272949 32.947713480000004 ZT20-23 24.3042299025 22.09946342 26.508996385000003