2
4
6
8
10
class boundaries
0.5
3.5
6.5
9.5
12.5
15.5
18.5
Frequency
[Graphs generated by this script: setBorder(54,40,20,5); initPicture(0,18.5,0,10);axes(1000,2,1,1000,2); fill="blue"; stroke="black"; textabs([165,0],"class boundaries","above");line([0.5,-0.2],[0.5,0.2]); text([0.5,0],"0.5","below");line([3.5,-0.2],[3.5,0.2]); text([3.5,0],"3.5","below");line([6.5,-0.2],[6.5,0.2]); text([6.5,0],"6.5","below");line([9.5,-0.2],[9.5,0.2]); text([9.5,0],"9.5","below");line([12.5,-0.2],[12.5,0.2]); text([12.5,0],"12.5","below");line([15.5,-0.2],[15.5,0.2]); text([15.5,0],"15.5","below");line([18.5,-0.2],[18.5,0.2]); text([18.5,0],"18.5","below");textabs([0,115],"Frequency","right",90);rect([0.5,0],[3.5,10]);rect([3.5,0],[6.5,6]);rect([6.5,0],[9.5,8]);rect([9.5,0],[12.5,5]);rect([12.5,0],[15.5,9]);rect([15.5,0],[18.5,3]);]
Based on the histogram above, what is the frequency of the class containing the value 11.