Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,10[	5	1	0.008333	0.008333	0.000833
[10,20[	15	32	0.266667	0.275	0.026667
[20,30[	25	63	0.525	0.8	0.0525
[30,40[	35	22	0.183333	0.983333	0.018333
[40,50]	45	2	0.016667	1	0.001667