condition mean min max ZT0-3 7.094849750000001 1.4591494999999999 12.730550000000001 ZT4-7 0.409009 0.409009 0.409009 ZT8-11 0.410008 0.410008 0.410008 ZT12-15 0 0 0 ZT16-19 0.6756295 0.6756295 0.6756295 ZT20-23 0.1810045 0.1810045 0.1810045