condition mean min max ZT0-3 842.28054335 772.6655566000001 911.8955301000001 ZT4-7 550.7210902500001 433.15909480000005 668.2830857 ZT8-11 343.787155325 327.0968472 360.47746345 ZT12-15 451.596129675 396.40421134999997 506.788048 ZT16-19 522.8774172000001 511.45177735000004 534.30305705 ZT20-23 502.16747402500005 474.82591675000003 529.5090313000001