S1 Correlation and Regression
Part of S1
Contents
Objectives
- Scatter diagrams
- Linear regression
- Calculation of the equation of a linear regression line using least squares
- Drawing regression line on a scatter diagram
- Explanatory (independent) and response (dependent) variables
- Applications and interpretations
- Make predictions within the range of values of the explanatory variable and recognise the dangers of extrapolation
- Variables other than x and y may be used
- Linear change of variable may be required
- The product moment correlation coefficient, its use, interpretation and limitations
