Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[460,480[	470	2	0.02381	0.02381	0.00119
[480,500[	490	3	0.035714	0.059524	0.001786
[500,520[	510	10	0.119048	0.178571	0.005952
[520,540[	530	15	0.178571	0.357143	0.008929
[540,560[	550	14	0.166667	0.52381	0.008333
[560,580[	570	16	0.190476	0.714286	0.009524
[580,600[	590	15	0.178571	0.892857	0.008929
[600,620[	610	3	0.035714	0.928571	0.001786
[620,640]	630	6	0.071429	1	0.003571