condition mean min max ZT0-3 0.36553800000000003 0.36553800000000003 0.36553800000000003 ZT4-7 0.258759 0.258759 0.258759 ZT8-11 0.0350769 0.0350769 0.0350769 ZT12-15 0.12852 0.12852 0.12852 ZT16-19 0.339163 0.339163 0.339163 ZT20-23 0.616249 0.616249 0.616249