Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[420,440[	430	3	0.032609	0.032609	0.00163
[440,460[	450	8	0.086957	0.119565	0.004348
[460,480[	470	11	0.119565	0.23913	0.005978
[480,500[	490	8	0.086957	0.326087	0.004348
[500,520[	510	17	0.184783	0.51087	0.009239
[520,540[	530	7	0.076087	0.586957	0.003804
[540,560[	550	6	0.065217	0.652174	0.003261
[560,580[	570	13	0.141304	0.793478	0.007065
[580,600[	590	10	0.108696	0.902174	0.005435
[600,620[	610	5	0.054348	0.956522	0.002717
[620,640[	630	4	0.043478	1	0.002174