condition mean min max ZT0-3 0.88106275 0.7403489999999999 1.0217765 ZT4-7 1.199885 1.199885 1.199885 ZT8-11 1.19759 1.19759 1.19759 ZT12-15 0 0 0 ZT16-19 0.8052945 0.8052945 0.8052945 ZT20-23 0.886911 0.886911 0.886911