Scatterplots Review

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.

Front

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.

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What does no correlation mean in a scatterplot?

Back

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

Front

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.

Front

How can you determine the strength of a correlation from a scatterplot?

Back

The strength of a correlation can be determined by how closely the points cluster around the line of best fit; tighter clusters indicate stronger correlations.

Front

What is the purpose of using a scatterplot?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables.

Front

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

Back

If the points are widely spread out, it suggests a weak correlation between the variables.

Front

How do you identify a linear relationship in a scatterplot?

Back

A linear relationship is identified when the points on the scatterplot form a pattern that can be approximated by a straight line.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are points that fall far from the trend of the data; they can significantly affect the line of best fit and the correlation.