Scatterplots

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 being plotted.

Front

What is a linear association in a scatterplot?

Back

A linear association means that the points in the scatterplot can be approximated by a straight line.

Front

What is a nonlinear association in a scatterplot?

Back

A nonlinear association means that the relationship between the variables cannot be accurately represented by a straight line.

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 points cluster around a line. A tighter cluster indicates a stronger association.

Front

What is the purpose of using scatterplots?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables.

Front

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

Back

The slope represents the rate of change between the two variables; a positive slope indicates a positive association, while a negative slope indicates a negative association.

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, ranging from -1 to 1.