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	21	0.35	0.4	0.035
[20,30[	25	21	0.35	0.75	0.035
[30,40[	35	3	0.05	0.8	0.005
[40,50[	45	8	0.133333	0.933333	0.013333
[50,60]	55	4	0.066667	1	0.006667