Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-50,-40[	-45	4	0.066667	0.066667	0.006667
[-40,-30[	-35	17	0.283333	0.35	0.028333
[-30,-20[	-25	6	0.1	0.45	0.01
[-20,-10[	-15	6	0.1	0.55	0.01
[-10,0[	-5	17	0.283333	0.833333	0.028333
[0,10]	5	10	0.166667	1	0.016667