Try This If Your Linear Regression Model is Underperforming
Change the model or alter the data.
At times, skewness in data can negatively influence the predictive power of your linear regression model.
If the model is underperforming, it may be due to skewness.
There are many ways to handle this:
Try a different model
Transform the skewed variable
The most commonly used transformations are:
Log transform: Apply the logarithmic function.
Sqrt transform: Apply the square root function.
Box-cox transform: You can use it using Scipy’s implementation: Scipy docs.
The effectiveness of the three transformations is clear from the image above.
Applying them transforms the skewed data into a (somewhat) normally distributed variable.
👉 Over to you: What are some other methods to handle skewness that you are aware of?
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Find the code for my tips here: GitHub.
I like to explore, experiment and write about data science concepts and tools. You can read my articles on Medium. Also, you can connect with me on LinkedIn and Twitter.