Scatterplot flashcard review

Front

What is an explanatory variable?

Back

An explanatory variable is a variable that is manipulated or changed in an experiment to observe its effect on a response variable.

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What is a response variable?

Back

A response variable is the outcome or effect that is measured in an experiment, which is influenced by the explanatory variable.

Front

What does a positive linear association indicate in a scatterplot?

Back

A positive linear association indicates that as one variable increases, the other variable also increases, resulting in a straight line that slopes upwards.

Front

What does a negative linear association indicate in a scatterplot?

Back

A negative linear association indicates that as one variable increases, the other variable decreases, resulting in a straight line that slopes downwards.

Front

What is a nonlinear association?

Back

A nonlinear association occurs when the relationship between two variables cannot be accurately represented by a straight line; the relationship may curve or change direction.

Front

How do you interpret a scatterplot?

Back

To interpret a scatterplot, look for patterns, trends, and associations between the two variables plotted on the x and y axes.

Front

What is the purpose of a scatterplot?

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A scatterplot is used to visually display the relationship between two quantitative variables, helping to identify correlations and trends.

Front

What does it mean if there is no association in a scatterplot?

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If there is no association in a scatterplot, it means that changes in one variable do not correspond to changes in the other variable; the points are scattered randomly.

Front

What is the significance of outliers in a scatterplot?

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Outliers are data points that fall far from the trend of the rest of the data; they can significantly affect the correlation and interpretation of the data.

Front

What is the correlation coefficient?

Back

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