Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[30,35[	32.5	2	0.027778	0.027778	0.005556
[35,40[	37.5	9	0.125	0.152778	0.025
[40,45[	42.5	15	0.208333	0.361111	0.041667
[45,50[	47.5	3	0.041667	0.402778	0.008333
[50,55[	52.5	11	0.152778	0.555556	0.030556
[55,60[	57.5	10	0.138889	0.694444	0.027778
[60,65[	62.5	4	0.055556	0.75	0.011111
[65,70[	67.5	3	0.041667	0.791667	0.008333
[70,75[	72.5	5	0.069444	0.861111	0.013889
[75,80[	77.5	5	0.069444	0.930556	0.013889
[80,85[	82.5	1	0.013889	0.944444	0.002778
[85,90]	87.5	4	0.055556	1	0.011111