Basic introduction to multiple regression using RStudio (Jan 2024)

This video demonstrates multiple linear regression using RStudio using fictional data. I begin by demonstrating how to import data from an SPSS data file into RStudio and then proceed to examine the structure of the data. Next, I perform multiple regression analysis both with and without factor variables. I illustrate how to change the reference level on dummy coded variables and also how to perform a test of the change in R-square to test the omnibus effect of a factor variable on the dependent variable. I also illustrate functions associated with the lm.beta and jtools packages. The data referenced in the video can be downloaded here: https://drive.google.com/file/d/1hDUYPes1HW1yrayy1nI-jwzTGBEum5FU/view A text file containing the code written during the presentation is provided here: https://drive.google.com/file/d/1SQ66OBAN-wMnEpx8C4WhUXNi21tygWD6/view The R file written during the presentation is linked here: https://drive.google.com/file/d/1541OE_o22VqjOy17xWcqkJ0gzlikNUx4/view