condition mean min max ZT0-3 12.4978094525 12.343076565 12.65254234 ZT4-7 13.0438603025 11.64531351 14.442407095 ZT8-11 28.3517449625 22.02244726 34.681042665 ZT12-15 25.917788684999998 21.05461823 30.78095914 ZT16-19 13.232241 12.917073779999999 13.547408220000001 ZT20-23 9.53349802675 9.0132085025 10.053787551