condition mean min max ZT0-3 1.20905575 1.1625765000000001 1.255535 ZT4-7 0.2217 0.2217 0.2217 ZT8-11 0.329788 0.329788 0.329788 ZT12-15 0 0 0 ZT16-19 0.16355 0.16355 0.16355 ZT20-23 0.27410599999999996 0.27410599999999996 0.27410599999999996