Data sources:
Cell phone churn: https://archive.ics.uci.edu/dataset/563/iranian+churn+dataset
California housing: https://www.kaggle.com/datasets/camnugent/california-housing-prices
Student performance: https://archive.ics.uci.edu/dataset/320/student+performance
Bike sharing: https://archive.ics.uci.edu/dataset/275/bike+sharing+dataset