Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[80,90[	85	2	0.026667	0.026667	0.002667
[90,100[	95	5	0.066667	0.093333	0.006667
[100,110[	105	15	0.2	0.293333	0.02
[110,120[	115	18	0.24	0.533333	0.024
[120,130[	125	13	0.173333	0.706667	0.017333
[130,140[	135	11	0.146667	0.853333	0.014667
[140,150[	145	5	0.066667	0.92	0.006667
[150,160[	155	4	0.053333	0.973333	0.005333
[160,170]	165	2	0.026667	1	0.002667