Correlation Coefficient Practice

Front

What is the correlation coefficient (r)?

Back

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

Front

What does an r value of 1 indicate?

Back

An r value of 1 indicates a perfect positive correlation, meaning that as one variable increases, the other variable also increases.

Front

What does an r value of -1 indicate?

Back

An r value of -1 indicates a perfect negative correlation, meaning that as one variable increases, the other variable decreases.

Front

What does an r value of 0 indicate?

Back

An r value of 0 indicates no correlation between the two variables, meaning there is no predictable relationship.

Front

What is a positive correlation?

Back

A positive correlation occurs when both variables move in the same direction; as one variable increases, the other also increases.

Front

What is a negative correlation?

Back

A negative correlation occurs when the variables move in opposite directions; as one variable increases, the other decreases.

Front

What is a scatter plot?

Back

A scatter plot is a graph that displays values for two variables for a set of data, using dots to represent the values.

Front

How can you determine the strength of a correlation?

Back

The strength of a correlation can be determined by the absolute value of the correlation coefficient (r); values closer to 1 or -1 indicate a stronger correlation.

Front

What does it mean if the correlation coefficient is close to 0?

Back

If the correlation coefficient is close to 0, it indicates a weak or no correlation between the variables.

Front

What is the formula for calculating the correlation coefficient?

Back