Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[0,20[	10	4	0.033333	0.033333	0.001667
[20,40[	30	15	0.125	0.158333	0.00625
[40,60[	50	19	0.158333	0.316667	0.007917
[60,80[	70	17	0.141667	0.458333	0.007083
[80,100[	90	12	0.1	0.558333	0.005
[100,120[	110	9	0.075	0.633333	0.00375
[120,140[	130	4	0.033333	0.666667	0.001667
[140,160[	150	9	0.075	0.741667	0.00375
[160,180[	170	4	0.033333	0.775	0.001667
[180,200[	190	8	0.066667	0.841667	0.003333
[200,220[	210	16	0.133333	0.975	0.006667
[220,240]	230	3	0.025	1	0.00125