The box plot represents the number of minutes customers spend on hold at a company.

what is the upper quartile of the data?

3
5
6
8

On the diagram you can see the box plot represents the number of minutes customers spend on hold at a company. Here are three main quartiles (three vertical lines, two of them are vertical sides of rectangle (at 3 and 6) and one - interior segment at 5):

The upper quartile of the data is

correct choice is C.