condition mean min max ZT0-3 696.0779132 650.265754 741.8900724 ZT4-7 446.00206722499996 424.2455384 467.75859604999994 ZT8-11 324.1348598 315.6891706 332.580549 ZT12-15 168.1824757 134.0916315 202.2733199 ZT16-19 225.463048175 200.97438945000002 249.9517069 ZT20-23 296.22822332500004 290.0969071 302.35953955