Scatterplot Relationships Flashcard

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a linear relationship in a scatterplot indicate?

Back

A linear relationship indicates that as one variable increases or decreases, the other variable tends to do the same in a consistent manner, forming a straight line when graphed.

Front

What does it mean if a scatterplot does NOT suggest a linear relationship?

Back

It means that the data points do not form a straight line and may show a curve or no clear pattern, indicating a more complex relationship.

Front

How can you predict a value using a scatterplot?

Back

You can predict a value by finding the corresponding point on the scatterplot that relates to the known variable and estimating the unknown variable based on the trend of the data.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables, identify trends, and make predictions based on observed data.

Front

What does it mean if the points on a scatterplot are tightly clustered?

Back

Tightly clustered points indicate a strong relationship between the two variables, suggesting that changes in one variable are closely associated with changes in the other.

Front

What does it mean if the points on a scatterplot are widely spread out?

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Widely spread out points indicate a weak relationship between the two variables, suggesting that changes in one variable do not consistently relate to changes in the other.

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.

Front

What does a positive correlation mean in a scatterplot?

Back

A positive correlation means that as one variable increases, the other variable also tends to increase, resulting in an upward trend in the scatterplot.

Front

What does a negative correlation mean in a scatterplot?

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A negative correlation means that as one variable increases, the other variable tends to decrease, resulting in a downward trend in the scatterplot.