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 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

How can you identify a positive association in a scatterplot?

Back

A positive association can be identified when the points on the scatterplot slope upwards from left to right.

Front

How can you identify a negative association in a scatterplot?

Back

A negative association can be identified when the points on the scatterplot slope downwards from left to right.

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 is an example of a situation that might show no association?

Back

An example of no association could be the relationship between the last digit of a person's phone number and the distance they drive to work.

Front

What is the correlation coefficient?

Back

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

Front

What does a correlation coefficient of 1 indicate?

Back

A correlation coefficient of 1 indicates a perfect positive linear relationship between two variables.