Check the assumptions of normality, linearity, homoscedasticity, and collinearity. Describe and provide support regarding whether the assumptions were met (Include supporting tables/graphs).
Stage 5. Multiple regression
1. Perform multiple regression to identify whether there is an association between the independent variables (age, height, sex, and smoke) and FEV, using forced entry and stepwise methods of regression. Describe, compare, and interpret your results (Include supporting tables).
2. Perform regression using only smoking status as an independent variable. Compare your results to the above regression results. Describe and interpret your findings.
The solution provides step by step method for the calculation of multiple regression analysis. Formula for the calculation and Interpretations of the results are also included.