Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-10,-5[	-7.5	1	0.011905	0.011905	0.002381
[-5,0[	-2.5	19	0.22619	0.238095	0.045238
[0,5[	2.5	28	0.333333	0.571429	0.066667
[5,10[	7.5	21	0.25	0.821429	0.05
[10,15[	12.5	14	0.166667	0.988095	0.033333
[15,20]	17.5	1	0.011905	1	0.002381