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Correlations: Relationship, Strength, & Direction

Correlations: Relationship, Strength, & Direction. Scatterplots are used to plot correlational data It displays the extent that two variables are related to one another . Relationship Strength. The strength of a relationship between two variables is on a scale from -1 to 1

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Correlations: Relationship, Strength, & Direction

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  1. Correlations: Relationship, Strength, & Direction • Scatterplots are used to plot correlational data • It displays the extent that two variables are related to one another

  2. Relationship Strength • The strength of a relationship between two variables is on a scale from -1 to 1 • Stronger relationships are closer to -1 or 1 • Weaker relationships are closer to 0

  3. Examples of Scatterplots

  4. Linear and Nonlinear Relationships • Linear relationships are best described by a straight line

  5. Nonlinear Relationships • Nonlinear relationships are best described by another type of curve

  6. Outliers • Outliers are scores that are very different from the rest of the data • They can dramatically impact the relationship between two variables

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