Day 5: Correlation

This is the first 2-variable model we’ll consider. Both variables (designated X and Y) are measures obtained from the same subjects. Basically, a mathematical representation of a scatterplot, a correlation indicates whether the variables move together in the same direction (+ correlation), move in opposite directions (- correlation) or move separately (0 correlation). Correlations are widely used to measure reliability, validity and commonality.

NOW YOU CHOOSE:
    Day 5: Correlation
    Bit More About Correlation
    Even More About Correlation
    Calculate Correlation
    Practice Problems
    More Practice Problems
    Word Problems
        Sim1            Sim2             Sim3
        Sim4            Sim5             Sim6
        Sim7            Sim8             Sim9
    Basic Facts About Correlation
     Audio: Lectures
    Vocabulary
    Formulas
    Quiz 5
    Summary