Scatterplot Relationships

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.

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What does a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

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 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

How can you identify a positive correlation in a scatterplot?

Back

A positive correlation is identified when the points on the scatterplot slope upwards from left to right.

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How can you identify a negative correlation in a scatterplot?

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A negative correlation is identified when the points on the scatterplot slope downwards from left to right.

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What is an example of a negative correlation?

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An example of a negative correlation is the relationship between temperature and the number of people wearing jackets; as temperature increases, the number of people wearing jackets decreases.

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What is an example of a positive correlation?

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An example of a positive correlation is the relationship between study time and test scores; as study time increases, test scores tend to increase.

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What is the purpose of a scatterplot?

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The purpose of a scatterplot is to visually display the relationship between two quantitative variables and to identify patterns or trends.