Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[20,25[	22.5	1	0.013889	0.013889	0.002778
[25,30[	27.5	3	0.041667	0.055556	0.008333
[30,35[	32.5	1	0.013889	0.069444	0.002778
[35,40[	37.5	7	0.097222	0.166667	0.019444
[40,45[	42.5	6	0.083333	0.25	0.016667
[45,50[	47.5	10	0.138889	0.388889	0.027778
[50,55[	52.5	10	0.138889	0.527778	0.027778
[55,60[	57.5	14	0.194444	0.722222	0.038889
[60,65[	62.5	11	0.152778	0.875	0.030556
[65,70[	67.5	3	0.041667	0.916667	0.008333
[70,75]	72.5	6	0.083333	1	0.016667