Correlation Coefficients

Front

What is a correlation coefficient?

Back

A correlation coefficient is a statistical measure that describes the strength and direction of a relationship between two variables. It ranges from -1 to 1.

Front

What does an r value of 1 indicate?

Back

An r value of 1 indicates a perfect positive correlation, meaning that as one variable increases, the other variable also increases in a perfectly linear manner.

Front

What does an r value of -1 indicate?

Back

An r value of -1 indicates a perfect negative correlation, meaning that as one variable increases, the other variable decreases in a perfectly linear manner.

Front

What does an r value of 0 indicate?

Back

An r value of 0 indicates no correlation between the two variables, meaning there is no predictable relationship between them.

Front

What is the range of correlation coefficients?

Back

The range of correlation coefficients is from -1 to 1.

Front

What does a positive correlation mean?

Back

A positive correlation means that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation mean?

Back

A negative correlation means that as one variable increases, the other variable tends to decrease.

Front

What is a scatter plot?

Back

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

Front

How can you determine the strength of a correlation?

Back

The strength of a correlation can be determined by the absolute value of the correlation coefficient (r). Values closer to 1 or -1 indicate a stronger correlation.

Front

What is a weak correlation?

Back

A weak correlation is indicated by a correlation coefficient close to 0, suggesting a minimal relationship between the variables.