Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[460,470[	465	13	0.154762	0.154762	0.015476
[470,480[	475	2	0.02381	0.178571	0.002381
[480,490[	485	9	0.107143	0.285714	0.010714
[490,500[	495	8	0.095238	0.380952	0.009524
[500,510[	505	16	0.190476	0.571429	0.019048
[510,520[	515	3	0.035714	0.607143	0.003571
[520,530[	525	10	0.119048	0.72619	0.011905
[530,540[	535	11	0.130952	0.857143	0.013095
[540,550[	545	5	0.059524	0.916667	0.005952
[550,560]	555	7	0.083333	1	0.008333