Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[5,10[	7.5	3	0.041667	0.041667	0.008333
[10,15[	12.5	2	0.027778	0.069444	0.005556
[15,20[	17.5	1	0.013889	0.083333	0.002778
[20,25[	22.5	0	0	0.083333	0
[25,30[	27.5	3	0.041667	0.125	0.008333
[30,35[	32.5	7	0.097222	0.222222	0.019444
[35,40[	37.5	20	0.277778	0.5	0.055556
[40,45[	42.5	14	0.194444	0.694444	0.038889
[45,50[	47.5	7	0.097222	0.791667	0.019444
[50,55[	52.5	8	0.111111	0.902778	0.022222
[55,60[	57.5	2	0.027778	0.930556	0.005556
[60,65[	62.5	1	0.013889	0.944444	0.002778
[65,70[	67.5	3	0.041667	0.986111	0.008333
[70,75[	72.5	0	0	0.986111	0
[75,80]	77.5	1	0.013889	1	0.002778