Exercise: Vocabulary, age, and epilepsy, 2

Question 2: What is a regression line?

Suggested answer

'Regression' is the name given to a group of procedures used to predict one variable, called the outcome, from another variable, called the predictor. A regression line is the graphical representation of the best prediction of the outcome variable (vocabulary test score) from the predictor (age).

This is a straight line, because the relationship which has been imposed on the data is of the form:

        vocabulary test score = intercept + slope × age.

Back to Exercise: Vocabulary, age, and epilepsy.

To Applied Biostatistics index.

To Martin Bland's M.Sc. index.

To Martin Bland's home page.

This page maintained by Martin Bland.
Last updated: 1 December, 2006.

Back to top.