Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[140,160[	150	3	0.041667	0.041667	0.002083
[160,180[	170	14	0.194444	0.236111	0.009722
[180,200[	190	13	0.180556	0.416667	0.009028
[200,220[	210	20	0.277778	0.694444	0.013889
[220,240[	230	12	0.166667	0.861111	0.008333
[240,260[	250	8	0.111111	0.972222	0.005556
[260,280]	270	2	0.027778	1	0.001389