Exercise 2
The following results are obtained from fitting the CE model to four measured gas concentrations ([latex]C_{m}[/latex]). Three parameters were varied to find the best fit simulated concentrations ([latex]C_{S}[/latex]) shown. Estimated measurement errors are shown for each dissolved gas concentration. Calculate the p‑value for these model results. How confident would you be in using this model to determine [latex]\frac{_{}^{3}H}{_{}^{3}{He}}[/latex] age for this groundwater sample? All concentrations are in units of ccSTP/g.
| Gas | Measured Concentration | Error (σ) | Best‑fit simulated concentration |
|---|---|---|---|
| Xe | 1.238 x 10-8 | 3.71 x 10-10 | 1.202 x 10-8 |
| Kr | 8.302 x 10-8 | 2.49 x 10-9 | 8.624 x 10-8 |
| Ar | 3.876 x 10-4 | 1.16 x 10-5 | 3.854 x 10-4 |
| Ne | 2.495 x 10-7 | 7.49 x 10-9 | 2.489 x 10-7 |