Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,20[	10	16	0.235294	0.235294	0.011765
[20,40[	30	17	0.25	0.485294	0.0125
[40,60[	50	7	0.102941	0.588235	0.005147
[60,80[	70	5	0.073529	0.661765	0.003676
[80,100[	90	9	0.132353	0.794118	0.006618
[100,120[	110	10	0.147059	0.941176	0.007353
[120,140]	130	4	0.058824	1	0.002941