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 correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What does no correlation mean in a scatterplot?

Back

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

Front

What is a linear association in a scatterplot?

Back

A linear association means that the data points 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 identify a positive linear association in a scatterplot?

Back

A positive linear association is identified when the data points slope upwards from left to right.

Front

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

Back

A negative linear association is identified when the data points slope downwards from left to right.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no correlation between the two variables.