condition mean min max ZT0-3 1012.6965 1012.6965 1012.6965 ZT4-7 767.326 767.326 767.326 ZT8-11 698.5740000000001 698.5740000000001 698.5740000000001 ZT12-15 657.5695 657.5695 657.5695 ZT16-19 1070.608 1070.608 1070.608 ZT20-23 1106.4 1106.4 1106.4