Scatterplots and Trendlines

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does a trendline represent in a scatterplot?

Back

A trendline is a line that best represents the data points in a scatterplot, showing the general direction of the data.

Front

What is a positive association in a scatterplot?

Back

A positive association means that as one variable increases, the other variable also tends to increase.

Front

What is a negative association in a scatterplot?

Back

A negative association means that as one variable increases, the other variable tends to decrease.

Front

What does 'no association' mean in the context of scatterplots?

Back

No association means there is no discernible relationship between the two variables; the points do not show a clear pattern.

Front

How can you determine the strength of an association in a scatterplot?

Back

The strength of an association can be determined by how closely the data points cluster around the trendline; tighter clusters indicate stronger associations.

Front

What is a linear association?

Back

A linear association is when the relationship between the two variables can be represented by a straight line.

Front

What is a non-linear association?

Back

A non-linear association is when the relationship between the two variables cannot be accurately represented by a straight line.

Front

How do you interpret a scatterplot with a positive trendline?

Back

A scatterplot with a positive trendline indicates that as one variable increases, the other variable also tends to increase.

Front

What does it mean if a scatterplot has a non-linear trend?

Back

It means that the relationship between the variables changes direction or rate, and cannot be represented by a straight line.