Correlation Coefficient Practice

Front

What is a correlation coefficient?

Back

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 -1 indicate?

Back

A perfect negative linear relationship between two variables.

Front

What does a correlation coefficient of 1 indicate?

Back

A perfect positive linear relationship between two variables.

Front

What does a correlation coefficient of 0 indicate?

Back

No linear relationship between the two variables.

Front

What is a scatter plot?

Back

A graphical representation of two variables, showing the relationship between them using points.

Front

What does a weak positive correlation look like on a scatter plot?

Back

Points that are loosely clustered around a line that slopes upwards.

Front

What does a strong negative correlation look like on a scatter plot?

Back

Points that are closely clustered around a line that slopes downwards.

Front

How can you determine the correlation from a scatter plot?

Back

By observing the direction and tightness of the clustering of points.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation indicates that one variable directly affects the other.

Front

What is the formula for calculating the correlation coefficient (r)?

Back