Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[30,40[	35	2	0.027778	0.027778	0.002778
[40,50[	45	10	0.138889	0.166667	0.013889
[50,60[	55	4	0.055556	0.222222	0.005556
[60,70[	65	4	0.055556	0.277778	0.005556
[70,80[	75	7	0.097222	0.375	0.009722
[80,90[	85	13	0.180556	0.555556	0.018056
[90,100[	95	18	0.25	0.805556	0.025
[100,110]	105	14	0.194444	1	0.019444