Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,10[	5	3	0.05	0.05	0.005
[10,20[	15	2	0.033333	0.083333	0.003333
[20,30[	25	3	0.05	0.133333	0.005
[30,40[	35	20	0.333333	0.466667	0.033333
[40,50[	45	19	0.316667	0.783333	0.031667
[50,60[	55	9	0.15	0.933333	0.015
[60,70[	65	3	0.05	0.983333	0.005
[70,80]	75	1	0.016667	1	0.001667