condition mean min max ZT0-3 28.0826522375 17.94193259 38.223371885 ZT4-7 46.273075845 41.358560585000006 51.187591104999996 ZT8-11 56.360419629999996 48.280517235 64.440322025 ZT12-15 57.7892931425 51.389404245 64.18918204 ZT16-19 51.3049143175 48.941251144999995 53.668577490000004 ZT20-23 39.8678213675 37.804740745000004 41.930901989999995