Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[20,40[	30	5	0.005556	0.005556	0.000278
[40,60[	50	46	0.051111	0.056667	0.002556
[60,80[	70	106	0.117778	0.174444	0.005889
[80,100[	90	299	0.332222	0.506667	0.016611
[100,120[	110	306	0.34	0.846667	0.017
[120,140[	130	80	0.088889	0.935556	0.004444
[140,160[	150	21	0.023333	0.958889	0.001167
[160,180[	170	20	0.022222	0.981111	0.001111
[180,200[	190	0	0	0.981111	0
[200,220[	210	16	0.017778	0.998889	0.000889
[220,240[	230	0	0	0.998889	0
[240,260]	250	1	0.001111	1	5.6e-05