Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[220,240[	230	1	0.013889	0.013889	0.000694
[240,260[	250	1	0.013889	0.027778	0.000694
[260,280[	270	0	0	0.027778	0
[280,300[	290	12	0.166667	0.194444	0.008333
[300,320[	310	9	0.125	0.319444	0.00625
[320,340[	330	8	0.111111	0.430556	0.005556
[340,360[	350	15	0.208333	0.638889	0.010417
[360,380[	370	14	0.194444	0.833333	0.009722
[380,400[	390	6	0.083333	0.916667	0.004167
[400,420[	410	5	0.069444	0.986111	0.003472
[420,440[	430	0	0	0.986111	0
[440,460]	450	1	0.013889	1	0.000694