Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[5,10[	7.5	1	0.017857	0.017857	0.003571
[10,15[	12.5	3	0.053571	0.071429	0.010714
[15,20[	17.5	4	0.071429	0.142857	0.014286
[20,25[	22.5	22	0.392857	0.535714	0.078571
[25,30[	27.5	19	0.339286	0.875	0.067857
[30,35[	32.5	4	0.071429	0.946429	0.014286
[35,40]	37.5	3	0.053571	1	0.010714