Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[10,15[	12.5	4	0.055556	0.055556	0.011111
[15,20[	17.5	30	0.416667	0.472222	0.083333
[20,25[	22.5	14	0.194444	0.666667	0.038889
[25,30[	27.5	4	0.055556	0.722222	0.011111
[30,35[	32.5	14	0.194444	0.916667	0.038889
[35,40[	37.5	3	0.041667	0.958333	0.008333
[40,45]	42.5	3	0.041667	1	0.008333