could you provide some sources to study Linear regression problems using Julia programming language?
In case you want something simple, please take a look at my tutorials for a class in financial eoonometrics. The repository’s Readme lists also other sources.
Chapter 4 of this document discusses basic linear regression, and it is accompanied by Julia examples in this directory. Other chapters in that source go into extensions.
This Data Science in Julia shows linear regression example using the MLJ machine learning toolkit, which wraps over 180 other ML models from 20 julia packages you can run using the same workflow.