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 the context of a scatterplot?

Back

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

Front

What is a linear association?

Back

A linear association is a relationship between two variables that can be represented by a straight line on a scatterplot.

Front

What is a nonlinear association?

Back

A nonlinear association is a relationship between two variables that cannot be represented by a straight line; the relationship may curve or change direction.

Front

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

Back

A positive linear association is identified by points that trend upwards from left to right, forming a straight line.

Front

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

Back

A negative linear association is identified by points that trend downwards from left to right, forming a straight line.

Front

What is an example of a positive linear association?

Back

An example is the relationship between the number of hours studied and test scores; generally, more study hours lead to higher scores.

Front

What is an example of a negative linear association?

Back

An example is the relationship between the amount of gas in a tank and the distance a car can travel; as gas decreases, the distance decreases.