Correlation Coefficient

Front

What is the correlation coefficient?

Back

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

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 1 indicate?

Back

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

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no linear relationship between the two variables.

Front

What is a strong positive correlation?

Back

A strong positive correlation is indicated by a correlation coefficient close to 1, meaning as one variable increases, the other variable also increases.

Front

What is a strong negative correlation?

Back

A strong negative correlation is indicated by a correlation coefficient close to -1, meaning as one variable increases, the other variable decreases.

Front

What is a scatter plot?

Back

A scatter plot is a graphical representation of two variables, where each point represents an observation, used to visualize the relationship between the variables.

Front

How can you visually identify a positive correlation in a scatter plot?

Back

A positive correlation in a scatter plot is identified by points that trend upwards from left to right.

Front

How can you visually identify a negative correlation in a scatter plot?

Back

A negative correlation in a scatter plot is identified by points that trend downwards from left to right.

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.