condition mean min max ZT0-3 4.5314825 3.849215 5.21375 ZT4-7 3.58779 3.58779 3.58779 ZT8-11 1.0983695 1.0983695 1.0983695 ZT12-15 0 0 0 ZT16-19 3.63354 3.63354 3.63354 ZT20-23 4.07636 4.07636 4.07636