The stack, and the evidence behind it.

The core of the work: finding the signal, then testing whether it survives scrutiny.

• Exploratory Data Analysisused in The sixteen-point gap nobody had mapped
• Statistical Modelingused in The model that was too perfect
• Hypothesis Testingused in The model that was too perfect
• Regression Analysisused in The model that was too perfect
• Correlation Analysisused in The model that was too perfect

A chart is an argument. I build ones that a director can read in ten seconds.

• Power BIcoursework
• R — ggplot2used in The model that was too perfect
• R — tidyverseused in The model that was too perfect
• Excel Chartsused in The weekend effect, and the Tuesday problem
• KPI & dashboard reportingused in The weekend effect, and the Tuesday problem

Excel isn't a lesser tool — badly built spreadsheets are. Mine audit themselves.

• Advanced Formulasused in A ledger that does its own math
• PivotTablesused in The weekend effect, and the Tuesday problem
• Power Queryused in A ledger that does its own math
• Power Pivotcoursework
• Google Sheetscoursework

Getting the right rows out before any analysis begins.

• SQL — Joinscoursework
• SQL — Aggregationscoursework
• SQL — Subqueriescoursework

Where the spreadsheet stops, the script starts.

• Rused in The model that was too perfect
• Pythoncoursework