Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[60,80[	70	23	0.212963	0.212963	0.010648
[80,100[	90	31	0.287037	0.5	0.014352
[100,120[	110	18	0.166667	0.666667	0.008333
[120,140[	130	23	0.212963	0.87963	0.010648
[140,160[	150	11	0.101852	0.981481	0.005093
[160,180]	170	2	0.018519	1	0.000926