Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,60[	50	2	0.018519	0.018519	0.000926
[60,80[	70	20	0.185185	0.203704	0.009259
[80,100[	90	38	0.351852	0.555556	0.017593
[100,120[	110	21	0.194444	0.75	0.009722
[120,140[	130	17	0.157407	0.907407	0.00787
[140,160[	150	3	0.027778	0.935185	0.001389
[160,180[	170	2	0.018519	0.953704	0.000926
[180,200[	190	1	0.009259	0.962963	0.000463
[200,220[	210	3	0.027778	0.990741	0.001389
[220,240]	230	1	0.009259	1	0.000463