Pairwise course analysis
Groton Schoolvs.Williston Northampton School 5K
Based on runners who competed on both courses during the same season. Positive values mean the second course ran slower; negative values mean it ran faster.
Model verdict
Williston Northampton School 5K runs slower
+3.36%
Roughly 40.3 seconds slower for a 20:00 runner
Paired observations
24
Developing evidence
Median difference
+5.00%
Middle runner-season comparison
Overall estimate
+3.36%
Network-adjusted course estimate
Middle 50% range
+4.94%
Observed variation (IQR)
Direction and magnitude
Relative course speed
Confidence interval
+3.49% to +6.88%
Scale shown
-8% to +8%
Course context
The two courses
Underlying runner comparisons
Same-season evidence
Each row represents one runner-season with valid results on both courses. Median performances reduce the effect of one unusually good or poor race. JV and varsity results are included.
| Runner | Season | Groton School | Williston Northampton School 5K | Difference |
|---|---|---|---|---|
| Adalynne Mertz | 2025 | 28:50.002 races | 28:29.001 race | -1.21% |
| Aaron DuFrend | 2025 | 21:17.001 race | 21:03.001 race | -1.10% |
| George Taggart | 2025 | 20:27.002 races | 20:14.001 race | -1.06% |
| Sydney Nelson | 2025 | 20:25.002 races | 20:43.001 race | +1.47% |
| Rory Christopher | 2025 | 19:59.002 races | 20:20.001 race | +1.75% |
| Ayo Pickering | 2025 | 27:50.002 races | 28:28.001 race | +2.28% |
| Chase Bellamy | 2025 | 17:51.001 race | 18:16.001 race | +2.33% |
| Kevin Kerrigan | 2025 | 20:50.002 races | 21:29.001 race | +3.12% |
| Bibi Miotke | 2025 | 26:10.002 races | 27:07.001 race | +3.63% |
| Izzy Hall | 2025 | 24:19.002 races | 25:15.001 race | +3.84% |
| Ryder Woodworth | 2025 | 18:53.002 races | 19:46.001 race | +4.68% |
| Eric Liang | 2025 | 20:16.002 races | 21:15.001 race | +4.85% |
| Mateo Garciarramos Petr | 2025 | 19:04.002 races | 20:03.001 race | +5.16% |
| Zachary Lim | 2025 | 21:36.001 race | 22:45.001 race | +5.32% |
| Pauline McAndrew | 2025 | 22:02.001 race | 23:19.001 race | +5.82% |
| Philip Holland | 2025 | 18:02.002 races | 19:06.001 race | +5.91% |
| Felix Deschenes | 2025 | 19:17.002 races | 20:33.001 race | +6.57% |
| Kelly Zhao | 2025 | 20:13.002 races | 21:40.001 race | +7.17% |
| Gabriela Coates | 2025 | 22:08.002 races | 23:54.001 race | +7.98% |
| Ceres Moraitis | 2025 | 19:18.002 races | 20:51.001 race | +8.03% |
| Henry Seilheimer | 2025 | 18:41.001 race | 20:28.001 race | +9.55% |
| Sofia FloresQuero Llama | 2025 | 21:16.002 races | 23:48.001 race | +11.91% |
| Samara Gorton | 2025 | 23:11.002 races | 26:04.001 race | +12.44% |
| Stephanie Mo | 2025 | 30:57.002 races | 35:49.001 race | +15.72% |