condition mean min max ZT0-3 0.01079086 0.01079086 0.01079086 ZT4-7 0.0068117 0.0068117 0.0068117 ZT8-11 0.0055619 0.0055619 0.0055619 ZT12-15 0.0090104 0.0090104 0.0090104 ZT16-19 0.05377875 0.05377875 0.05377875 ZT20-23 0.03272865 0.03272865 0.03272865