Question

where is the upper quartile in this box - and - whisker plot? 72 78 84 90

Explanation:

Step1: Recall box - and - whisker plot components

In a box - and - whisker plot, the box has two ends. The left end of the box represents the lower quartile (Q1), and the right end of the box represents the upper quartile (Q3).

Step2: Identify the upper quartile from the plot

Looking at the given box - and - whisker plot, the right end of the box is at 90. So the upper quartile is at 90.

Answer:

90 (corresponding to the option with value 90, e.g., if the option is D. 90, then D. 90)