Correlation and line of best fit

Front

What does a correlation coefficient (r) of 0.3 indicate?

Back

Weak positive correlation.

Front

What does a correlation coefficient (r) of -0.89 indicate?

Back

Strong negative correlation.

Front

Estimate the correlation coefficient for a scatterplot that shows a strong downward trend.

Back

r = -0.9.

Front

What is the expected correlation between study time and test grades?

Back

Positive correlation.

Front

Estimate the correlation coefficient for a scatterplot that shows a strong upward trend.

Back

r = 0.89.

Front

What is the range of possible values for a correlation coefficient?

Back

-1 to 1.

Front

What does a correlation coefficient (r) of 1 indicate?

Back

Perfect positive correlation.

Front

What does a correlation coefficient (r) of -1 indicate?

Back

Perfect negative correlation.

Front

What does a correlation coefficient (r) of 0 indicate?

Back

No correlation.

Front

How can you visually assess correlation in data?

Back

By using a scatterplot.