Standardized regression coefficients are used to measure the strength of the relationship between predictor variables and the outcome variable, independent of the variables' original scales.
These coefficients are often represented using the Greek letter Beta.
The symbol commonly used to depict the standardized regression coefficient is:
This notation is distinct from the symbol used for unstandardized coefficients (typically '$b$' or '$\beta_1$'). Therefore, $\beta$ is the standard symbol for the standardized regression coefficient.