Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[200,220[	210	3	0.041667	0.041667	0.002083
[220,240[	230	12	0.166667	0.208333	0.008333
[240,260[	250	13	0.180556	0.388889	0.009028
[260,280[	270	23	0.319444	0.708333	0.015972
[280,300[	290	14	0.194444	0.902778	0.009722
[300,320[	310	5	0.069444	0.972222	0.003472
[320,340]	330	2	0.027778	1	0.001389