# Tagged Questions

1answer
261 views

### Why the $R^2$, AIC and BIC criteria give different “best model” for models of equal complexity?

I'm modeling growth curve of several ecosystems with respect to their rainfall-productivity relationship using a simple linear regression $\text{ANPP}(t)=a+b\cdot\text{Rain}(t)$ and a modified ...
2answers
269 views

### Model selection with nonlinear fitting? Statistical tests seem ambiguous

I'm working on fitting an exponential model $\mathrm{Flux} = A+Bt+F\left(\exp(t_0-t/T_r) + \exp(t-t_0/T_f)\right)^{-1}+...$ to astronomical data (a light curve). $A$, $B$, $F$, $t_0$, $T_r$, and ...
1answer
166 views

### Residual, linear least squares and quality engineering

I wanted to ask this question on stackoverflow but I think it is more suitable here. If I am wrong, please tell me. My question concerns the use in statistics to analyse physical/engineering data. As ...
0answers
383 views

### How do I determine which functional form is correct?

I have an assignment that asks me to explore different series of data with respect to the effects that an incinerator built in 1981 in Massachusetts, has on the price of houses in that area. I have ...
3answers
236 views

### How to select best model out of linear, quadratic, and a model involving an exponential? Are the models nested?

I'm examining the growth rate of species en function of ion carbonate. For each specie, I have different measured of ion carbonate, it can be in different temperature or pH. For each measure, I'm ...