Unit 8: Scatterplots and Associations

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 linear association indicate in a scatterplot?

Back

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

Front

What does a negative linear association indicate in a scatterplot?

Back

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

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatterplot, showing the overall trend of the data.

Front

What does it mean if there is no association in a scatterplot?

Back

If there is no association, it means that changes in one variable do not affect the other variable.

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 line of best fit; tighter clusters indicate a stronger association.

Front

What is an example of a positive linear association?

Back

An example of a positive linear association is the relationship between hours studied and test scores, where more study time generally leads to higher scores.

Front

What is an example of a negative linear association?

Back

An example of a negative linear association is the relationship between the amount of time spent on social media and grades, where more time on social media may lead to lower grades.

Front

What is a non-linear association?

Back

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

Front

How do you interpret a scatterplot with a negative relationship?

Back

In a scatterplot with a negative relationship, as one variable increases, the other variable decreases, indicating an inverse relationship.