Correlation Coefficient

Front

What is a correlation coefficient?

Back

A statistical measure that describes the strength and direction of a relationship between two variables.

Front

What does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What does a positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What is the range of the correlation coefficient?

Back

The correlation coefficient ranges from -1 to 1.

Front

What does a correlation coefficient of -1 signify?

Back

A perfect negative correlation between two variables.

Front

What does a correlation coefficient of 1 signify?

Back

A perfect positive correlation between two variables.

Front

What does a correlation coefficient of 0 signify?

Back

No correlation between the two variables.

Front

How can you visually assess correlation?

Back

By using a scatter plot to observe the relationship between two variables.

Front

What is the formula for calculating the correlation coefficient (r)?

Back

r = (nΣxy - ΣxΣy) / sqrt[(nΣx^2 - (Σx)^2)(nΣy^2 - (Σy)^2)]

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.