Scatterplots and Trendlines

Front

What is a scatter plot?

Back

A graph that shows the relationship of two data sets.

Front

What does a negative association in a scatter plot indicate?

Back

As one variable increases, the other variable decreases.

Front

What does a positive association in a scatter plot indicate?

Back

As one variable increases, the other variable also increases.

Front

What is no association in a scatter plot?

Back

There is no discernible relationship between the two variables.

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 do you identify an outlier using the IQR method?

Back

An outlier is identified if it is less than Q1 - (1.5 x IQR) or greater than Q3 + (1.5 x IQR).

Front

What is a trendline?

Back

A line that best represents the data points in a scatter plot.

Front

How can you use a trendline to make predictions?

Back

You can extend the trendline to estimate values for variables not directly measured.

Front

What does a steep trendline indicate?

Back

A steep trendline indicates a strong relationship between the variables.

Front

What does a flat trendline indicate?

Back

A flat trendline indicates a weak relationship between the variables.