condition mean min max ZT0-3 0.5253093 0.4200861 0.6305325 ZT4-7 0.6750085 0.6750085 0.6750085 ZT8-11 1.5971549999999999 1.5971549999999999 1.5971549999999999 ZT12-15 0 0 0 ZT16-19 2.20338 2.20338 2.20338 ZT20-23 1.9938699999999998 1.9938699999999998 1.9938699999999998