i) Partial regression coefficients are a measure of the effect of a single independent variable on the dependent variable, while controlling for the effects of other independent variables. They are used to identify the individual contribution of each independent variable to the overall regression model.
ii) Partial correlation coefficients measure the strength of the linear relationship between two variables, while controlling for the effects of other variables. They are used to identify the strength of the relationship between two variables, while controlling for the effects of other variables.
