Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[460,480[	470	2	0.033898	0.033898	0.001695
[480,500[	490	2	0.033898	0.067797	0.001695
[500,520[	510	9	0.152542	0.220339	0.007627
[520,540[	530	15	0.254237	0.474576	0.012712
[540,560[	550	12	0.20339	0.677966	0.010169
[560,580[	570	8	0.135593	0.813559	0.00678
[580,600[	590	9	0.152542	0.966102	0.007627
[600,620]	610	2	0.033898	1	0.001695