condition mean min max ZT0-3 1.13614475 0.8463295 1.42596 ZT4-7 0.6480495 0.6480495 0.6480495 ZT8-11 0.4397405 0.4397405 0.4397405 ZT12-15 0 0 0 ZT16-19 0.9968805000000001 0.9968805000000001 0.9968805000000001 ZT20-23 0.9977875 0.9977875 0.9977875