Scatterplots

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What is a scatterplot?

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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.

Tags

CCSS.8.SP.A.1

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What does a strong association in a scatterplot indicate?

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A strong association indicates that as one variable increases or decreases, the other variable tends to also increase or decrease in a predictable manner.

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CCSS.HSF.LE.B.5

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What is a trend line in a scatterplot?

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A trend line is a straight or curved line that represents the general direction of the data points in a scatterplot.

Tags

CCSS.8.SP.A.2

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How can you identify a linear relationship in a scatterplot?

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A linear relationship can be identified if the data points form a pattern that can be approximated by a straight line.

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CCSS.8.F.A.3

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What is a non-linear relationship in a scatterplot?

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A non-linear relationship occurs when the data points do not follow a straight line pattern, indicating a more complex relationship between the variables.

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CCSS.8.F.A.3

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What does it mean if a scatterplot has a positive correlation?

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

Tags

CCSS.HSS.ID.B.5

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What does it mean if a scatterplot has a negative correlation?

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

Tags

CCSS.HSS.ID.B.5

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What is the purpose of using scatterplots in data analysis?

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

Tags

CCSS.8.SP.A.1

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What are outliers in a scatterplot?

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Outliers are data points that fall far away from the other points in the scatterplot, indicating they may not fit the general trend.

Tags

CCSS.8.SP.A.1

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How do you interpret the slope of a trend line in a scatterplot?

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

Tags

CCSS.8.EE.B.5