condition mean min max ZT0-3 3.6620953592500003 3.121120501 4.2030702175000005 ZT4-7 8.3464915705 7.7293070445000005 8.9636760965 ZT8-11 13.91524990325 10.7885319365 17.04196787 ZT12-15 11.55645954 11.325624505 11.787294575 ZT16-19 21.748857235 16.901597199999998 26.59611727 ZT20-23 47.30883450500001 36.029201920000006 58.58846709