Null error rate, confusion matrices, and accuracy, precision, recall and F1 at thresholds 0.2, 0.5 and 0.8 for a penguin sex classifier, with use cases for each threshold.

Six friends rate six 2025 movies: a normalized SQLite database loaded into R, with a tested strategy for missing ratings and a check on whether standardizing ratings helps.

Loading 25 seasons of EPL match data into R, selecting and renaming columns, decoding the full-time result target variable, and checking a COVID-era home-advantage study against the cleaned data.