Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[30,40[	35	20	0.277778	0.277778	0.027778
[40,50[	45	27	0.375	0.652778	0.0375
[50,60[	55	19	0.263889	0.916667	0.026389
[60,70[	65	3	0.041667	0.958333	0.004167
[70,80[	75	2	0.027778	0.986111	0.002778
[80,90[	85	0	0	0.986111	0
[90,100]	95	1	0.013889	1	0.001389