Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[10,15[	12.5	3	0.075	0.075	0.015
[15,20[	17.5	8	0.2	0.275	0.04
[20,25[	22.5	11	0.275	0.55	0.055
[25,30[	27.5	9	0.225	0.775	0.045
[30,35[	32.5	1	0.025	0.8	0.005
[35,40[	37.5	2	0.05	0.85	0.01
[40,45[	42.5	1	0.025	0.875	0.005
[45,50[	47.5	4	0.1	0.975	0.02
[50,55[	52.5	0	0	0.975	0
[55,60[	57.5	0	0	0.975	0
[60,65[	62.5	0	0	0.975	0
[65,70]	67.5	1	0.025	1	0.005