Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[420,440[	430	3	0.022901	0.022901	0.001145
[440,460[	450	6	0.045802	0.068702	0.00229
[460,480[	470	13	0.099237	0.167939	0.004962
[480,500[	490	8	0.061069	0.229008	0.003053
[500,520[	510	23	0.175573	0.40458	0.008779
[520,540[	530	16	0.122137	0.526718	0.006107
[540,560[	550	13	0.099237	0.625954	0.004962
[560,580[	570	19	0.145038	0.770992	0.007252
[580,600[	590	18	0.137405	0.908397	0.00687
[600,620[	610	6	0.045802	0.954198	0.00229
[620,640]	630	6	0.045802	1	0.00229