condition mean min max ZT0-3 0.63319 0.63319 0.63319 ZT4-7 0.3677615 0.3677615 0.3677615 ZT8-11 0.6074005 0.6074005 0.6074005 ZT12-15 1.93776 1.93776 1.93776 ZT16-19 1.76692 1.76692 1.76692 ZT20-23 0.718155 0.718155 0.718155