condition mean min max ZT0-3 0.5432775059999999 0.482084839 0.6044701729999999 ZT4-7 0.7433708105000001 0.41298607 1.073755551 ZT8-11 1.0775030992499999 0.480078177 1.6749280215 ZT12-15 1.9065042345 1.5487786165 2.2642298525 ZT16-19 0.283107036 0.1693661635 0.3968479085 ZT20-23 0.19988847475 0.150401492 0.2493754575