Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[20,40[	30	3	0.025	0.025	0.00125
[40,60[	50	5	0.041667	0.066667	0.002083
[60,80[	70	3	0.025	0.091667	0.00125
[80,100[	90	7	0.058333	0.15	0.002917
[100,120[	110	4	0.033333	0.183333	0.001667
[120,140[	130	6	0.05	0.233333	0.0025
[140,160[	150	9	0.075	0.308333	0.00375
[160,180[	170	24	0.2	0.508333	0.01
[180,200[	190	35	0.291667	0.8	0.014583
[200,220[	210	21	0.175	0.975	0.00875
[220,240]	230	3	0.025	1	0.00125