condition mean min max ZT0-3 119.281159 119.281159 119.281159 ZT4-7 154.8387825 154.8387825 154.8387825 ZT8-11 111.7607885 111.7607885 111.7607885 ZT12-15 131.0400725 131.0400725 131.0400725 ZT16-19 120.5777775 120.5777775 120.5777775 ZT20-23 114.65959749999999 114.65959749999999 114.65959749999999