Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[160,180[	170	3	0.041667	0.041667	0.002083
[180,200[	190	18	0.25	0.291667	0.0125
[200,220[	210	17	0.236111	0.527778	0.011806
[220,240[	230	7	0.097222	0.625	0.004861
[240,260[	250	6	0.083333	0.708333	0.004167
[260,280[	270	8	0.111111	0.819444	0.005556
[280,300]	290	13	0.180556	1	0.009028