Scatterplots and association

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 positive association in a scatterplot indicate?

Back

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

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

What does no association mean in a scatterplot?

Back

No association means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How can you identify a positive linear association in a scatterplot?

Back

A positive linear association can be identified by a pattern of points that slopes upwards from left to right.

Front

How can you identify a negative linear association in a scatterplot?

Back

A negative linear association can be identified by a pattern of points that slopes downwards from left to right.

Front

What is the purpose of a trend line in a scatterplot?

Back

A trend line helps to visualize the overall direction of the data points and can indicate the type of association.

Front

What does it mean if a scatterplot shows a non-linear association?

Back

A non-linear association means that the relationship between the variables does not follow a straight line; it may curve or have a different pattern.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations. They can affect the overall interpretation of the association.

Front

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

Back

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