Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,10[	5	3	0.015873	0.015873	0.001587
[10,20[	15	0	0	0.015873	0
[20,30[	25	0	0	0.015873	0
[30,40[	35	0	0	0.015873	0
[40,50[	45	9	0.047619	0.063492	0.004762
[50,60[	55	66	0.349206	0.412698	0.034921
[60,70[	65	108	0.571429	0.984127	0.057143
[70,80]	75	3	0.015873	1	0.001587