I was a bit confused with the meaning of $\beta$, and thought its usage was rather loose. In fact, it seems that $\beta$ is used to express two distinct concepts:
- The generalisation of the sample "b coefficient" to the population concerned.
- The standardized regression coefficients (regression coefficients obtained when all variables are standardized with a sd of 1).
Would there be an alternative symbol to any one of the two significations above, to avoid this confusion?