condition mean min max ZT0-3 151.2582276675 133.896597735 168.6198576 ZT4-7 64.9122239825 60.801146595 69.02330137 ZT8-11 34.13638535 29.655375235 38.617395465 ZT12-15 8.392858854 6.397135191 10.388582517 ZT16-19 14.708893607 13.663656129 15.754131085000001 ZT20-23 15.1982990375 14.659152425 15.73744565