Sigma notation
Sigma notation from Mathcentre
Case study: “Measuring the competitiveness of sport: are the top teams getting too strong?” (Concentration ratio)
Case study: “Is the Scottish Premier League less competitive than its English Counterpart?” (Hirschman-Herfindahl Index)
Case study: “Measuring health improvements for a cost-effectiveness analysis”
Sigma notation from Mathtutor
Matrices
Matrices guides, tests, and exercises from Mathcentre