Clusters and Outliers

Front

What is a cluster in a data set?

Back

A cluster is a group of data points that are close to each other in a scatter plot, indicating a common trend or pattern.

Front

What is an outlier in a data set?

Back

An outlier is a data point that is significantly different from the other points in the data set, often lying far away from the cluster.

Front

How can you identify an outlier in a scatter plot?

Back

An outlier can be identified as a point that is distant from the main cluster of points in the scatter plot.

Front

What does a positive correlation indicate?

Back

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

Front

What does a negative correlation indicate?

Back

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

Front

What is a linear relationship?

Back

A linear relationship is a relationship between two variables that can be represented by a straight line on a graph.

Front

What is a non-linear relationship?

Back

A non-linear relationship is a relationship between two variables that does not form a straight line when graphed.

Front

What is the purpose of a scatter plot?

Back

A scatter plot is used to visually display the relationship between two quantitative variables.

Front

What does it mean if there is no correlation between two variables?

Back

If there is no correlation, it means that changes in one variable do not affect the other variable.

Front

How can you determine the strength of a correlation?

Back

The strength of a correlation can be determined by how closely the data points cluster around a line of best fit.