Correlation Review

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. A positive correlation means that as one variable increases, the other also increases, while a negative correlation means that as one variable increases, the other decreases.

Front

What does a correlation coefficient of 1 indicate?

Back

A correlation coefficient of 1 indicates a perfect positive correlation, meaning that the two variables move in the same direction perfectly.

Front

What does a correlation coefficient of -1 indicate?

Back

A correlation coefficient of -1 indicates a perfect negative correlation, meaning that the two variables move in opposite directions perfectly.

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no correlation, meaning that there is no relationship 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 is used to visualize the relationship between the variables.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What is a weak correlation?

Back

A weak correlation indicates that there is a slight relationship between two variables, but it is not strong enough to be significant.

Front

What is a strong correlation?

Back

A strong correlation indicates a strong relationship between two variables, meaning that changes in one variable are closely associated with changes in the other.

Front

How can you determine the strength of a correlation?

Back

The strength of a correlation can be determined by the correlation coefficient, which ranges from -1 to 1. Values closer to -1 or 1 indicate a stronger correlation.