Scatterplot Correlation

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 positive correlation mean in a scatterplot?

Back

Positive correlation means that as one variable increases, the other variable also tends to increase. The points on the scatterplot slope upwards.

Front

What does negative correlation mean in a scatterplot?

Back

Negative correlation means that as one variable increases, the other variable tends to decrease. The points on the scatterplot slope downwards.

Front

What does no correlation mean in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables. The points on the scatterplot are scattered randomly.

Front

How can you identify positive correlation in a scatterplot?

Back

You can identify positive correlation by observing that the points trend upwards from left to right.

Front

How can you identify negative correlation in a scatterplot?

Back

You can identify negative correlation by observing that the points trend downwards from left to right.

Front

What is an example of positive correlation?

Back

An example of positive correlation is the relationship between height and weight; generally, taller people weigh more.

Front

What is an example of negative correlation?

Back

An example of negative correlation is the relationship between the amount of time spent studying and the number of mistakes made on a test; more study time usually leads to fewer mistakes.

Front

What is an example of no correlation?

Back

An example of no correlation is the relationship between shoe size and intelligence; there is no predictable relationship between these two variables.

Front

What is the purpose of using scatterplots?

Back

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