condition mean min max ZT0-3 8.10039006325 5.665627215 10.535152911499999 ZT4-7 27.3067498875 21.661330125 32.95216965 ZT8-11 47.6517263625 37.798042475 57.50541025 ZT12-15 202.2929855475 196.18516465 208.400806445 ZT16-19 169.451189 143.4793588 195.4230192 ZT20-23 104.24905035750001 97.64476443500001 110.85333628