condition mean min max ZT0-3 80.001975 80.001975 80.001975 ZT4-7 174.7207935 174.7207935 174.7207935 ZT8-11 162.33299599999998 162.33299599999998 162.33299599999998 ZT12-15 129.8046215 129.8046215 129.8046215 ZT16-19 134.952785 134.952785 134.952785 ZT20-23 101.99846099999999 101.99846099999999 101.99846099999999