condition mean min max ZT0-3 1.211125 1.211125 1.211125 ZT4-7 1.2236150000000001 1.2236150000000001 1.2236150000000001 ZT8-11 1.030404 1.030404 1.030404 ZT12-15 0.9477855 0.9477855 0.9477855 ZT16-19 1.37325 1.37325 1.37325 ZT20-23 1.183111 1.183111 1.183111