Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,50[	45	2	0.012579	0.012579	0.001258
[50,60[	55	12	0.075472	0.08805	0.007547
[60,70[	65	37	0.232704	0.320755	0.02327
[70,80[	75	54	0.339623	0.660377	0.033962
[80,90[	85	31	0.194969	0.855346	0.019497
[90,100[	95	16	0.100629	0.955975	0.010063
[100,110]	105	7	0.044025	1	0.004403