condition mean min max ZT0-3 1.0050525000000001 0.84955 1.160555 ZT4-7 0.857415 0.857415 0.857415 ZT8-11 0.59016 0.59016 0.59016 ZT12-15 0 0 0 ZT16-19 2.28209 2.28209 2.28209 ZT20-23 3.7306800000000004 3.7306800000000004 3.7306800000000004