Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[20,30[	25	1	0.005	0.005	5e-04
[30,40[	35	4	0.02	0.025	0.002
[40,50[	45	16	0.08	0.105	0.008
[50,60[	55	31	0.155	0.26	0.0155
[60,70[	65	55	0.275	0.535	0.0275
[70,80[	75	49	0.245	0.78	0.0245
[80,90[	85	21	0.105	0.885	0.0105
[90,100[	95	18	0.09	0.975	0.009
[100,110]	105	5	0.025	1	0.0025