condition mean min max ZT0-3 57.685925 57.685925 57.685925 ZT4-7 93.252577 93.252577 93.252577 ZT8-11 27.901536 27.901536 27.901536 ZT12-15 162.1584205 162.1584205 162.1584205 ZT16-19 42.7066025 42.7066025 42.7066025 ZT20-23 87.94100399999999 87.94100399999999 87.94100399999999