Correlation Coefficient

Front

What does a correlation coefficient of 1 indicate?

Back

Perfect positive linear relationship

Front

What does a correlation coefficient of -1 indicate?

Back

Perfect negative linear relationship

Front

What type of association does a graph with a positive slope have?

Back

Positive association

Front

As x increases, y increases. What type of correlation is this?

Back

Positive correlation

Front

What is a line of best fit used for?

Back

To make predictions

Front

What is the range of values for a correlation coefficient?

Back

-1 to 1

Front

What does a correlation coefficient of 0 indicate?

Back

No relationship between the variables

Front

If the correlation coefficient is close to 1, what does it imply about the relationship?

Back

Strong positive linear relationship

Front

If the correlation coefficient is close to -1, what does it imply about the relationship?

Back

Strong negative linear relationship

Front

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

Back

r = (nΣxy - ΣxΣy) / sqrt[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]