Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[440,460[	450	2	0.027397	0.027397	0.00137
[460,480[	470	6	0.082192	0.109589	0.00411
[480,500[	490	1	0.013699	0.123288	0.000685
[500,520[	510	13	0.178082	0.30137	0.008904
[520,540[	530	5	0.068493	0.369863	0.003425
[540,560[	550	9	0.123288	0.493151	0.006164
[560,580[	570	16	0.219178	0.712329	0.010959
[580,600[	590	11	0.150685	0.863014	0.007534
[600,620[	610	6	0.082192	0.945205	0.00411
[620,640[	630	4	0.054795	1	0.00274