Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[70,80[	75	2	0.027397	0.027397	0.00274
[80,90[	85	11	0.150685	0.178082	0.015068
[90,100[	95	10	0.136986	0.315068	0.013699
[100,110[	105	13	0.178082	0.493151	0.017808
[110,120[	115	21	0.287671	0.780822	0.028767
[120,130[	125	6	0.082192	0.863014	0.008219
[130,140]	135	10	0.136986	1	0.013699