Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[40,60[	50	4	0.047619	0.047619	0.002381
[60,80[	70	13	0.154762	0.202381	0.007738
[80,100[	90	26	0.309524	0.511905	0.015476
[100,120[	110	12	0.142857	0.654762	0.007143
[120,140[	130	21	0.25	0.904762	0.0125
[140,160[	150	6	0.071429	0.97619	0.003571
[160,180]	170	2	0.02381	1	0.00119