condition mean min max ZT0-3 1.37758825 0.8315135 1.923663 ZT4-7 0.1223405 0.1223405 0.1223405 ZT8-11 0.237578 0.237578 0.237578 ZT12-15 0 0 0 ZT16-19 3.65932 3.65932 3.65932 ZT20-23 0.35675 0.35675 0.35675