Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[70,80[	75	14	0.194444	0.194444	0.019444
[80,90[	85	21	0.291667	0.486111	0.029167
[90,100[	95	14	0.194444	0.680556	0.019444
[100,110[	105	9	0.125	0.805556	0.0125
[110,120[	115	11	0.152778	0.958333	0.015278
[120,130]	125	3	0.041667	1	0.004167