condition mean min max ZT0-3 2.1360349999999997 2.1360349999999997 2.1360349999999997 ZT4-7 1.58256 1.58256 1.58256 ZT8-11 0.745844 0.745844 0.745844 ZT12-15 0.863606 0.863606 0.863606 ZT16-19 3.94782 3.94782 3.94782 ZT20-23 2.60914 2.60914 2.60914