Scatter Plots and Associations

Front

What is a scatter plot?

Back

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

Front

What does a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

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

Front

What does no correlation mean in a scatter plot?

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

How can you determine the type of association from a scatter plot?

Back

By observing the direction of the data points: if they trend upwards, it's positive; if they trend downwards, it's negative; if they are scattered randomly, there's no correlation.

Front

What is the purpose of using scatter plots?

Back

Scatter plots are used to visually represent the relationship between two variables and to identify patterns, trends, or correlations.

Front

What is an example of a positive correlation?

Back

An example of a positive correlation is the relationship between the number of hours studied and test scores; generally, more study time leads to higher scores.

Front

What is an example of a negative correlation?

Back

An example of a negative correlation is the relationship between the amount of gas in a tank and the number of miles driven; as miles increase, gas decreases.

Front

What type of variables are typically represented in scatter plots?

Back

Scatter plots typically represent two quantitative variables.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that differ significantly from other observations; they can indicate variability in the data or errors in measurement.