Correlations

• What is a correlation?

  A method used to analyse the association between two co-variables
• What is a co-variable?

  The variables measured in a correlation
• How are correlations plotted?

  Using a scattergram
• What is a correlation coefficient?

  A number between -1 and +1 that tells us the strength and the direction of the relationship between the two co-variables
• What does the sign before tell us the correlation coefficient?

  The direction of the relationship between two co-variables (positive or negative)