Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,60[	50	17	0.236111	0.236111	0.011806
[60,80[	70	15	0.208333	0.444444	0.010417
[80,100[	90	15	0.208333	0.652778	0.010417
[100,120[	110	6	0.083333	0.736111	0.004167
[120,140[	130	15	0.208333	0.944444	0.010417
[140,160[	150	1	0.013889	0.958333	0.000694
[160,180[	170	2	0.027778	0.986111	0.001389
[180,200]	190	1	0.013889	1	0.000694