U7D12 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 r = -0.85 indicate?

Back

A strong negative correlation between the two variables.

Front

What does a correlation coefficient of r = 0.83 indicate?

Back

A strong positive correlation between the two variables.

Front

If the correlation between homework completion and quiz grades is 0.87, what can be concluded?

Back

As homework completion increases, quiz grades increase.

Front

What does a correlation coefficient of r = -0.98 suggest?

Back

A very strong negative correlation between the two variables.

Front

What does it mean if the correlation coefficient is 0?

Back

There is no correlation between the two variables.

Front

What is a scatter plot?

Back

A graphical representation of the relationship between two quantitative variables.

Front

What does a downward slope in a scatter plot indicate?

Back

A negative correlation between the two variables.

Front

What does an upward slope in a scatter plot indicate?

Back

A positive correlation between the two variables.

Front

How can you estimate the strength of a correlation?

Back

By looking at the absolute value of the correlation coefficient; values closer to 1 or -1 indicate stronger correlations.