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 in a perfectly linear manner.

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 in a perfectly linear manner.

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 two variables move in the same direction; as one variable increases, the other variable also increases.

Front

What is a negative correlation?

Back

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

Front

What is a weak correlation?

Back

A weak correlation indicates that there is a slight relationship between two variables, but it is not strong enough to be considered significant.

Front

What is a strong correlation?

Back

A strong correlation indicates a strong relationship between two variables, where changes in one variable are closely associated with changes in the other.

Front

How can you visually assess correlation?

Back

You can visually assess correlation by examining a scatter plot, where the pattern of points indicates the type and strength of correlation.

Front

What is the difference between correlation and causation?

Back

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