condition mean min max ZT0-3 38.76812 38.76812 38.76812 ZT4-7 48.038233 48.038233 48.038233 ZT8-11 40.267996499999995 40.267996499999995 40.267996499999995 ZT12-15 36.196793 36.196793 36.196793 ZT16-19 31.6781845 31.6781845 31.6781845 ZT20-23 29.832422 29.832422 29.832422