Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[440,460[	450	2	0.018349	0.018349	0.000917
[460,480[	470	6	0.055046	0.073394	0.002752
[480,500[	490	3	0.027523	0.100917	0.001376
[500,520[	510	19	0.174312	0.275229	0.008716
[520,540[	530	15	0.137615	0.412844	0.006881
[540,560[	550	14	0.12844	0.541284	0.006422
[560,580[	570	20	0.183486	0.724771	0.009174
[580,600[	590	18	0.165138	0.889908	0.008257
[600,620[	610	6	0.055046	0.944954	0.002752
[620,640]	630	6	0.055046	1	0.002752