AGS1 Module 9 Review #1

Front

What is the correlation coefficient?

Back

The correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of r = 1 indicate?

Back

A correlation coefficient of r = 1 indicates a perfect positive linear relationship between two variables.

Front

What does a correlation coefficient of r = -1 indicate?

Back

A correlation coefficient of r = -1 indicates a perfect negative linear relationship between two variables.

Front

What does a correlation coefficient of r = 0 indicate?

Back

A correlation coefficient of r = 0 indicates no linear relationship between two variables.

Front

What does a correlation coefficient of r ≈ 0.8 suggest?

Back

A correlation coefficient of r ≈ 0.8 suggests a strong positive linear relationship between two variables.

Front

What does a correlation coefficient of r ≈ -0.8 suggest?

Back

A correlation coefficient of r ≈ -0.8 suggests a strong negative linear relationship between two variables.

Front

How can you estimate the correlation coefficient from a scatterplot?

Back

You can estimate the correlation coefficient from a scatterplot by observing the direction and tightness of the data points around a line of best fit.

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a tight clustering of points in a scatterplot indicate?

Back

A tight clustering of points in a scatterplot indicates a strong correlation between the two variables.

Front

What does a wide spread of points in a scatterplot indicate?

Back

A wide spread of points in a scatterplot indicates a weak correlation between the two variables.