Use nested loops to remove unwanted characters from multiple columns
Filter Pandas DataFrames based on multiple conditions using both .loc[] and .query()
Create bubble charts using the Seaborn Library
Style Seaborn charts using the pre-built styles and by modifying Matplotlib parameters
Use floor division (i.e., integer division) to convert years to decades
Use Seaborn to superimpose a linear regressions over our data
Make a judgement if our regression is good or bad based on how well the model fits our data and the r-squared metric
Run regressions with scikit-learn and calculate the coefficients.