condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 2.679875 2.679875 2.679875 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 2.6695 2.6695 2.6695 ZT20-23 2.69953 2.69953 2.69953