Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-40,-30[	-35	2	0.025	0.025	0.002941
[-30,-20[	-25	5	0.0625	0.0875	0.007353
[-20,-10[	-15	11	0.1375	0.225	0.016176
[-10,0[	-5	15	0.1875	0.4125	0.022059
[0,10[	5	21	0.2625	0.675	0.030882
[10,20[	15	5	0.0625	0.7375	0.007353
[20,30[	25	6	0.075	0.8125	0.008824
[30,40[	35	1	0.0125	0.825	0.001471
[40,50[	45	0	0	0.825	0
[50,60]	55	2	0.025	0.85	0.002941