Question

what is the first quartile of the data set represented by the box plot shown below? a. 20 b. 13 c. 25 d. 40

Explanation:

Step1: Recall box - plot properties

In a box - plot, the left - most value of the box represents the first quartile ($Q_1$).

Step2: Identify the first quartile

Looking at the box - plot, the left - most value of the box is 20.

Answer:

A. 20