Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[80,90[	85	7	0.0875	0.0875	0.00875
[90,100[	95	12	0.15	0.2375	0.015
[100,110[	105	23	0.2875	0.525	0.02875
[110,120[	115	21	0.2625	0.7875	0.02625
[120,130[	125	11	0.1375	0.925	0.01375
[130,140[	135	5	0.0625	0.9875	0.00625
[140,150[	145	1	0.0125	1	0.00125