condition mean min max ZT0-3 81.879314 81.879314 81.879314 ZT4-7 98.78498350000001 98.78498350000001 98.78498350000001 ZT8-11 79.6207205 79.6207205 79.6207205 ZT12-15 76.8115525 76.8115525 76.8115525 ZT16-19 91.322051 91.322051 91.322051 ZT20-23 78.049966 78.049966 78.049966