Question

the box - and - whisker plot below represents some data set. what is the value of the lower quartile?

Explanation:

Step1: Identify lower - quartile position

In a box - and - whisker plot, the left - hand edge of the box represents the lower quartile ($Q_1$).

Step2: Read the value

Looking at the number line below the box - and - whisker plot, the value at the left - hand edge of the box is 80.

Answer:

80