Correlation

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. It can indicate the strength and direction of a relationship.

Front

What does a correlation coefficient (r) of 1 indicate?

Back

A correlation coefficient (r) 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 a correlation coefficient (r) of -1 indicate?

Back

A correlation coefficient (r) 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 a correlation coefficient (r) of 0 indicate?

Back

A correlation coefficient (r) of 0 indicates no correlation, meaning there is no predictable relationship between the two variables.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

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 an example of a positive correlation?

Back

An example of a positive correlation is the relationship between hours studied and test scores; as study time increases, test scores tend to increase.

Front

What is an example of a negative correlation?

Back

An example of a negative correlation is the relationship between the amount of exercise and body weight; as exercise increases, body weight tends to decrease.

Front

What does it mean if two variables have no correlation?

Back

If two variables have no correlation, it means that changes in one variable do not predict changes in the other variable.