The following histogram shows the Final Averages of students in a Math class. What is the standard deviation in the averages?

A bar graph has a horizontal axis, titled Final Average, labeled, [60,70], (70,80], (80,90], and (90,100], and a vertical axis, titled Number of Students, labeled from 0 to 3.5 in increments of 0.5. There are 4 vertical bars, each of which is over one of the horizontal labels. The height of the bars, from left to right, is 3, 1, 3, and 1.

Responses
12.0

10.9

8.1

8.8