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41,188 Portuguese bank marketing contacts with 21 features including demographics, campaign data, and economic indicators. 11.27% subscription rate for term deposits.

440 wholesale customer records from a Portuguese distributor with annual spending across 6 product categories (Fresh, Milk, Grocery, Frozen, Detergents_Paper, Delicassen). A benchmark dataset for customer segmentation, K-means clustering, and market basket analysis.

569 breast tumor samples with 30 cell nucleus features from FNA images. Gold-standard benchmark for cancer classification ML models with 37% malignant, 63% benign distribution.

Classic UCI Wine Dataset with 178 samples from 3 Italian cultivars, featuring 13 chemical attributes for multi-class classification, clustering, and dimensionality reduction benchmarking.

Classic 1974 Motor Trend dataset with 32 automobiles (1973-74 models) and 11 performance variables covering fuel consumption and automobile design aspects - the most widely used benchmark dataset in R programming and statistical education.