Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[460,480[	470	2	0.027397	0.027397	0.00137
[480,500[	490	3	0.041096	0.068493	0.002055
[500,520[	510	15	0.205479	0.273973	0.010274
[520,540[	530	7	0.09589	0.369863	0.004795
[540,560[	550	9	0.123288	0.493151	0.006164
[560,580[	570	14	0.191781	0.684932	0.009589
[580,600[	590	13	0.178082	0.863014	0.008904
[600,620[	610	4	0.054795	0.917808	0.00274
[620,640]	630	6	0.082192	1	0.00411