just y=ax+b [General Sta­tis­tics]

posted by DavidManteigas – Portugal, 2017-10-09 10:34  – Posting: # 17881
Views: 13,452

Dear El Maestro,

That is changing the logic of statistics :-D Find the right data for your model instead of finding the right model for your data.

For those models, I think R squared is the way to go, although different sample sizes might have an influence depending on the range of samples that you have. How "small" are the samples? Between 30 and 50 observations per sample? Would methods like cross-validation work on the datasets?
What about calculating confidence intervals for the adjusted R squared of each model and use a Forest plot of those CI, one line for each dataset? This might give you an idea of the impact of the different sample sizes in this particular problem and to decide whether just looking at R square would be enough. Depending on the number of datasets, visual inspection and influence statistics might help on deciding which is the best data for the model. :-D

Regards,
David

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