condition mean min max ZT0-3 1856.404857 1856.404857 1856.404857 ZT4-7 2697.101292 2697.101292 2697.101292 ZT8-11 2791.9129255 2791.9129255 2791.9129255 ZT12-15 2431.5012875 2431.5012875 2431.5012875 ZT16-19 1164.6057865 1164.6057865 1164.6057865 ZT20-23 1256.2184765000002 1256.2184765000002 1256.2184765000002