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 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 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 non-linear association?

Back

A non-linear association is a relationship between two variables that does not follow a straight line on a scatterplot.

Front

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

Back

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

Front

How can you identify a linear association in a scatterplot?

Back

A linear association can be identified by a pattern of points that closely follows a straight line.

Front

What is the purpose of using scatterplots?

Back

Scatterplots are used to visually represent the relationship between two quantitative variables and to identify patterns or trends.

Front

What does the slope of a line in a scatterplot represent?

Back

The slope of a line in a scatterplot represents the rate of change between the two variables.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a linear relationship between two variables.