condition mean min max ZT0-3 9.495984642749999 7.0869995155000005 11.90496977 ZT4-7 3.7271769655 3.1595434015 4.294810529499999 ZT8-11 5.104676609 4.5339328885 5.6754203295 ZT12-15 4.46443065625 3.5860858545000003 5.342775458 ZT16-19 8.0702845325 7.0630732445 9.077495820500001 ZT20-23 11.109434037500002 10.916565465000001 11.30230261