Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[120,140[	130	2	0.033333	0.033333	0.001667
[140,160[	150	12	0.2	0.233333	0.01
[160,180[	170	8	0.133333	0.366667	0.006667
[180,200[	190	2	0.033333	0.4	0.001667
[200,220[	210	7	0.116667	0.516667	0.005833
[220,240[	230	7	0.116667	0.633333	0.005833
[240,260[	250	19	0.316667	0.95	0.015833
[260,280]	270	3	0.05	1	0.0025