Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-5,0[	-2.5	12	0.142857	0.142857	0.028571
[0,5[	2.5	24	0.285714	0.428571	0.057143
[5,10[	7.5	24	0.285714	0.714286	0.057143
[10,15[	12.5	19	0.22619	0.940476	0.045238
[15,20]	17.5	5	0.059524	1	0.011905