condition mean min max ZT0-3 3.70954049425 3.6027436875 3.8163373010000003 ZT4-7 5.11310909125 4.359727588 5.8664905945 ZT8-11 8.35737933075 7.147569689500001 9.567188972 ZT12-15 6.57191960575 5.9748067785 7.169032433 ZT16-19 4.3869288015 4.3279800135 4.4458775895 ZT20-23 4.5500675165 4.4039999455 4.6961350875