When presenting and analyzing quantitative research data, which of the following mathematical symbols is used to denote that one variable 'is proportional to' another?
≈\approx≈
≪\ll≪
∝\propto∝
≫\gg≫
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.