Correlation Coefficient Practice

Front

What is the correlation coefficient?

Back

The correlation coefficient, denoted as 'r', is a statistical measure that describes the strength and direction of a relationship between two variables.

Front

What is the range of the correlation coefficient?

Back

The correlation coefficient 'r' ranges from -1 to 1, inclusive (-1 ≤ r ≤ 1).

Front

What does a correlation coefficient of 1 indicate?

Back

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

Front

What does a correlation coefficient of -1 indicate?

Back

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

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no linear correlation 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 does a strong correlation mean?

Back

A strong correlation means that the data points closely follow a linear pattern, either positively or negatively.

Front

What does a weak correlation mean?

Back

A weak correlation means that the data points do not closely follow a linear pattern.

Front

How can you visually assess correlation?

Back

You can visually assess correlation by examining a scatterplot of the data points.