condition mean min max ZT0-3 10.74349882725 7.6311632245 13.85583443 ZT4-7 5.2516684445 5.139448610500001 5.363888278499999 ZT8-11 7.7882656279999996 6.387387776 9.18914348 ZT12-15 8.9513881075 8.535948763 9.366827451999999 ZT16-19 9.34155991475 8.984111219999999 9.6990086095 ZT20-23 9.349368907999999 9.1569069465 9.5418308695