Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[490,500[	495	7	0.083333	0.083333	0.008333
[500,510[	505	6	0.071429	0.154762	0.007143
[510,520[	515	4	0.047619	0.202381	0.004762
[520,530[	525	19	0.22619	0.428571	0.022619
[530,540[	535	13	0.154762	0.583333	0.015476
[540,550[	545	7	0.083333	0.666667	0.008333
[550,560[	555	5	0.059524	0.72619	0.005952
[560,570[	565	11	0.130952	0.857143	0.013095
[570,580]	575	12	0.142857	1	0.014286