Creating new variables, such as "Total Square Footage" by combining basement and floor areas.

The set includes nearly 3,000 individual observations. Why is it in a .7z File?

The .7z extension indicates a high-compression archive created by . Users often package the dataset this way because:

Applying algorithms like Linear Regression, Random Forest, or XGBoost to predict house prices.

It significantly reduces the size of the CSV files for faster sharing and downloading.

It contains 79 explanatory variables describing almost every aspect of residential homes.