condition mean min max ZT0-3 1.24758825 1.2324015 1.262775 ZT4-7 1.338825 1.338825 1.338825 ZT8-11 0.914247 0.914247 0.914247 ZT12-15 0 0 0 ZT16-19 1.377355 1.377355 1.377355 ZT20-23 1.232985 1.232985 1.232985