Scattter Plots & Correlation

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What is a scatter plot?

Back

A scatter plot 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 correlation mean in statistics?

Back

Correlation refers to a statistical relationship between two variables, indicating how one variable may change in relation to another.

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What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

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What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

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What does it mean if there is no correlation?

Back

No correlation means that there is no predictable relationship between the two variables; changes in one do not affect the other.

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How can you identify a positive correlation in a scatter plot?

Back

In a scatter plot, a positive correlation is identified when the points trend upwards from left to right.

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How can you identify a negative correlation in a scatter plot?

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In a scatter plot, a negative correlation is identified when the points trend downwards from left to right.

Front

What is the purpose of using scatter plots?

Back

Scatter plots are used to visualize the relationship between two quantitative variables and to identify patterns or trends.

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.

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What does a correlation coefficient of 1 indicate?

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