Question

shown below are the scatter plots for four data sets. answer the questions that follow. (a) choose the data set that has an outlier. (b) choose the two data sets that show clustering.

Explanation:

• Part (a): An outlier is a data point that is far from the other data points. In Figure 3, there are points that are separated from the main group of points.
• Part (b): Clustering occurs when data points group together. In Figure 3, there are two distinct clusters of points. In Figure 4, there are three distinct clusters of points.

Answer:

(a) Data set in Figure 3
(b) Data set in Figure 3, Data set in Figure 4