Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,10[	5	3	0.041667	0.041667	0.004167
[10,20[	15	3	0.041667	0.083333	0.004167
[20,30[	25	3	0.041667	0.125	0.004167
[30,40[	35	27	0.375	0.5	0.0375
[40,50[	45	21	0.291667	0.791667	0.029167
[50,60[	55	10	0.138889	0.930556	0.013889
[60,70[	65	4	0.055556	0.986111	0.005556
[70,80]	75	1	0.013889	1	0.001389