Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-10,-5[	-7.5	1	0.013889	0.013889	0.002778
[-5,0[	-2.5	19	0.263889	0.277778	0.052778
[0,5[	2.5	28	0.388889	0.666667	0.077778
[5,10[	7.5	20	0.277778	0.944444	0.055556
[10,15]	12.5	4	0.055556	1	0.011111