condition mean min max ZT0-3 9.32497138675 8.552801851 10.0971409225 ZT4-7 8.436872243 7.759885706 9.113858780000001 ZT8-11 13.185748258250001 11.1829483315 15.188548185 ZT12-15 15.56780312475 14.75182454 16.3837817095 ZT16-19 14.0906457875 11.332291914999999 16.84899966 ZT20-23 28.23198819 24.381239565 32.082736815