condition mean min max ZT0-3 0.11447088333333333 0.11352599999999999 0.11614749999999999 ZT4-7 0.8909845000000001 0.8909845000000001 0.8909845000000001 ZT8-11 4.62121 4.62121 4.62121 ZT12-15 1.1563732500000001 0.7693464999999999 1.5434 ZT16-19 0.5367225 0.5367225 0.5367225 ZT20-23 0.28185 0.28185 0.28185