condition mean min max ZT0-3 0.0337567 0.0337567 0.0337567 ZT4-7 0.0 0.0 0.0 ZT8-11 0.040701600000000004 0.040701600000000004 0.040701600000000004 ZT12-15 0.10579235 0.10579235 0.10579235 ZT16-19 0.08803 0.08803 0.08803 ZT20-23 0.0871886 0.0871886 0.0871886