Scatterplot Introduction

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What is a scatterplot?

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A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

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CCSS.8.SP.A.1

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What does a positive correlation in a scatterplot indicate?

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

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CCSS.HSS.ID.B.5

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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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CCSS.HSS.ID.B.5

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What does no correlation mean in a scatterplot?

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

Tags

CCSS.HSS.ID.B.5

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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 points in the scatterplot form a straight line or a pattern that closely resembles a straight line.

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CCSS.8.F.A.3

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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 correlations.

Tags

CCSS.8.SP.A.1

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What does it mean if a scatterplot shows a non-linear association?

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A non-linear association means that the relationship between the variables does not follow a straight line; it may curve or have a different pattern.

Tags

CCSS.HSS.ID.B.5

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What is the significance of the slope in a linear scatterplot?

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The slope indicates the direction and steepness of the relationship between the two variables; a positive slope indicates a positive correlation, while a negative slope indicates a negative correlation.

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CCSS.8.EE.B.5

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How can outliers affect a scatterplot?

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Outliers can skew the results and may misrepresent the relationship between the variables, making it appear stronger or weaker than it actually is.

Tags

CCSS.8.SP.A.1

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What is the x-axis in a scatterplot?

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The x-axis is the horizontal axis that typically represents the independent variable in a scatterplot.