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 are the types of correlation?

Back

There are three types of correlation: Positive correlation (both variables increase together), Negative correlation (one variable increases while the other decreases), and No correlation (no relationship between the variables).

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also increases.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) is a numerical value between -1 and 1 that quantifies the strength and direction of a correlation between two variables.

Front

What does r = 1 signify?

Back

r = 1 signifies a perfect positive correlation, meaning that the two variables move in the same direction perfectly.

Front

What does r = -1 signify?

Back

r = -1 signifies a perfect negative correlation, meaning that the two variables move in opposite directions perfectly.

Front

What does r = 0 signify?

Back

r = 0 signifies no correlation, meaning there is no relationship between the two variables.

Front

How do you interpret a correlation coefficient of r = 0.43?

Back

A correlation coefficient of r = 0.43 indicates a moderate positive correlation between the two variables.

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, where each point represents an observation. It helps visualize the relationship between the variables.