condition mean min max ZT0-3 3.4072883333333333 0.99293 5.55595 ZT4-7 0.0 0.0 0.0 ZT8-11 0.90989 0.90989 0.90989 ZT12-15 2.8207575 1.009535 4.63198 ZT16-19 2.64654 2.64654 2.64654 ZT20-23 8.810955 8.810955 8.810955