Correlation Coefficient

Front

What is the correlation coefficient?

Back

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

Front

What does a correlation coefficient of -1 indicate?

Back

A perfect negative linear relationship between two variables.

Front

What does a correlation coefficient of 1 indicate?

Back

A perfect positive linear relationship between two variables.

Front

What does a correlation coefficient of 0 indicate?

Back

No linear relationship between the two variables.

Front

How can you determine if a correlation is weak, moderate, or strong?

Back

By looking at the absolute value of the correlation coefficient: 0.0-0.3 (weak), 0.3-0.7 (moderate), 0.7-1.0 (strong).

Front

What is the line of best fit?

Back

A straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

Front

What is the formula for the line of best fit in slope-intercept form?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What does a positive slope in a line of best fit indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative slope in a line of best fit indicate?

Back

As one variable increases, the other variable decreases.

Front

How do you interpret a correlation coefficient of -0.9?

Back

There is a strong negative correlation between the two variables.