H2 Maths Notes (JC 1-2): 6.6) Correlation and Linear Regression

Q: What does H2 Maths Notes (JC 1-2): 6.6) Correlation and Linear Regression cover?
A: Product-moment correlation, least-squares lines, residual interpretation, and prediction limits for H2 Maths.

Before you revise
Revisit scatter diagram basics and variance formulas so the transition to algebraic PMCC and regression is smooth. Keep a graphing calculator (GC) or spreadsheet handy to compute $r$ and regression coefficients quickly.

Core Definitions

• Product-moment correlation coefficient $r$ measures linear association between $x$ and $y$; $-1 \leq r \leq 1$