Scatterplots - Mastery Monday Dec. 9th

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 in a scatterplot indicate?

Back

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

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What does a negative correlation in a scatterplot indicate?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

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What does no correlation mean in a scatterplot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one do not predict changes in the other.

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What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, showing the trend of the data.

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How can you determine the type of association from a scatterplot?

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You can determine the type of association by observing the direction and pattern of the points: linear, nonlinear, positive, negative, or no association.

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What is a nonlinear association?

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A nonlinear association is when the relationship between the variables cannot be accurately represented by a straight line.

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What is the purpose of using a scatterplot?

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The purpose of using a scatterplot is to visually assess the relationship between two quantitative variables.

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How do you interpret the slope of a line of best fit?

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The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Front

What does it mean if a scatterplot has a cluster of points?

Back

A cluster of points indicates that there is a concentration of data points in that area, suggesting a possible relationship.