Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,50[	45	1	0.008333	0.008333	0.000833
[50,60[	55	1	0.008333	0.016667	0.000833
[60,70[	65	7	0.058333	0.075	0.005833
[70,80[	75	11	0.091667	0.166667	0.009167
[80,90[	85	17	0.141667	0.308333	0.014167
[90,100[	95	31	0.258333	0.566667	0.025833
[100,110[	105	16	0.133333	0.7	0.013333
[110,120[	115	15	0.125	0.825	0.0125
[120,130[	125	13	0.108333	0.933333	0.010833
[130,140[	135	5	0.041667	0.975	0.004167
[140,150]	145	3	0.025	1	0.0025