Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[60,80[	70	16	0.133333	0.133333	0.006667
[80,100[	90	23	0.191667	0.325	0.009583
[100,120[	110	12	0.1	0.425	0.005
[120,140[	130	9	0.075	0.5	0.00375
[140,160[	150	6	0.05	0.55	0.0025
[160,180[	170	10	0.083333	0.633333	0.004167
[180,200[	190	11	0.091667	0.725	0.004583
[200,220[	210	12	0.1	0.825	0.005
[220,240[	230	13	0.108333	0.933333	0.005417
[240,260[	250	5	0.041667	0.975	0.002083
[260,280]	270	3	0.025	1	0.00125