Stats - Bivariate Data Unit 2

Front

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

Back

Weak positive correlation.

Front

What type of association does a scatter plot with a downward trend represent?

Back

Strong negative association.

Front

Given a scatter plot, how can you estimate the correlation coefficient (r)?

Back

By observing the direction and strength of the trend in the data points.

Front

What is an outlier in a scatter plot?

Back

A point that is far outside the main cluster of points/ordered pairs.

Front

How does an outlier affect the correlation coefficient?

Back

An outlier can significantly skew the correlation coefficient, making it misleading.

Front

What does a correlation coefficient (r) of -0.862 suggest about the data?

Back

Strong negative correlation.

Front

What does a correlation coefficient (r) of 0.934 suggest about the data?

Back

Strong positive correlation.

Front

What is the range of possible values for the correlation coefficient (r)?

Back

The range is from -1 to 1.

Front

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

Back

No correlation between the variables.

Front

How can you identify an outlier in a scatter plot?

Back

By looking for points that do not follow the general trend of the other points.