Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-80,-60[	-70	2	0.005556	0.005556	0.000278
[-60,-40[	-50	12	0.033333	0.038889	0.001667
[-40,-20[	-30	64	0.177778	0.216667	0.008889
[-20,0[	-10	117	0.325	0.541667	0.01625
[0,20[	10	96	0.266667	0.808333	0.013333
[20,40[	30	55	0.152778	0.961111	0.007639
[40,60[	50	12	0.033333	0.994444	0.001667
[60,80[	70	1	0.002778	0.997222	0.000139
[80,100[	90	0	0	0.997222	0
[100,120[	110	0	0	0.997222	0
[120,140]	130	1	0.002778	1	0.000139