Correlation & Regression

Correlation & Regression

---

Definitions

Coefficient of Determination

The percent of the variation that can be explained by the regression equation

Correlation

A method used to determine if a relationship between variables exists

Correlation Coefficient

A statistic or parameter which measures the strength and direction of a relationship between two variables

Dependent Variable

A variable in correlation or regression that can not be controlled, that is, it depends on the independent variable.

Independent Variable

A variable in correlation or regression which can be controlled, that is, it is independent of the other variable.

Pearson Product Moment Correlation Coefficient

A measure of the strength and direction of the linear relationship between two variables

Regression

A method used to describe the relationship between two variables.

Regression Line

The best fit line.

Scatter Plot

An plot of the data values on a coordinate system. The independent variable is graphed along the x-axis and the dependent variable along the y-axis

Standard Error of the Estimate

The standard deviation of the observed values about the predicted values