Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,50[	45	7	0.058333	0.058333	0.005833
[50,60[	55	16	0.133333	0.191667	0.013333
[60,70[	65	17	0.141667	0.333333	0.014167
[70,80[	75	16	0.133333	0.466667	0.013333
[80,90[	85	21	0.175	0.641667	0.0175
[90,100[	95	15	0.125	0.766667	0.0125
[100,110[	105	8	0.066667	0.833333	0.006667
[110,120[	115	7	0.058333	0.891667	0.005833
[120,130[	125	6	0.05	0.941667	0.005
[130,140[	135	3	0.025	0.966667	0.0025
[140,150[	145	3	0.025	0.991667	0.0025
[150,160]	155	1	0.008333	1	0.000833