Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,50[	45	2	0.027778	0.027778	0.002778
[50,60[	55	8	0.111111	0.138889	0.011111
[60,70[	65	5	0.069444	0.208333	0.006944
[70,80[	75	4	0.055556	0.263889	0.005556
[80,90[	85	16	0.222222	0.486111	0.022222
[90,100[	95	6	0.083333	0.569444	0.008333
[100,110[	105	9	0.125	0.694444	0.0125
[110,120[	115	12	0.166667	0.861111	0.016667
[120,130[	125	6	0.083333	0.944444	0.008333
[130,140[	135	2	0.027778	0.972222	0.002778
[140,150[	145	2	0.027778	1	0.002778