Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[80,100[	90	3	0.025	0.025	0.00125
[100,120[	110	4	0.033333	0.058333	0.001667
[120,140[	130	5	0.041667	0.1	0.002083
[140,160[	150	7	0.058333	0.158333	0.002917
[160,180[	170	13	0.108333	0.266667	0.005417
[180,200[	190	31	0.258333	0.525	0.012917
[200,220[	210	23	0.191667	0.716667	0.009583
[220,240[	230	18	0.15	0.866667	0.0075
[240,260[	250	14	0.116667	0.983333	0.005833
[260,280]	270	2	0.016667	1	0.000833