Unit 3: Linear Regression

Front

What is the 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 positive linear relationship between two variables.

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 0 indicate?

Back

No linear relationship between the two variables.

Front

What is a positive correlation?

Back

A relationship where, as one variable increases, the other variable also increases.

Front

What is a negative correlation?

Back

A relationship where, as one variable increases, the other variable decreases.

Front

What is no correlation?

Back

A situation where there is no discernible relationship between two variables.

Front

What does a correlation coefficient of 0.89 indicate?

Back

A strong positive correlation between two variables.

Front

What does a correlation coefficient of 0.3 indicate?

Back

A weak positive correlation between two variables.

Front

How can you visually assess correlation?

Back

By analyzing the scatterplot of the data points.