Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[440,460[	450	2	0.02381	0.02381	0.00119
[460,480[	470	6	0.071429	0.095238	0.003571
[480,500[	490	3	0.035714	0.130952	0.001786
[500,520[	510	19	0.22619	0.357143	0.01131
[520,540[	530	8	0.095238	0.452381	0.004762
[540,560[	550	9	0.107143	0.559524	0.005357
[560,580[	570	14	0.166667	0.72619	0.008333
[580,600[	590	13	0.154762	0.880952	0.007738
[600,620[	610	4	0.047619	0.928571	0.002381
[620,640]	630	6	0.071429	1	0.003571