Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-25,-20[	-22.5	2	0.018519	0.018519	0.003704
[-20,-15[	-17.5	4	0.037037	0.055556	0.007407
[-15,-10[	-12.5	3	0.027778	0.083333	0.005556
[-10,-5[	-7.5	5	0.046296	0.12963	0.009259
[-5,0[	-2.5	30	0.277778	0.407407	0.055556
[0,5[	2.5	11	0.101852	0.509259	0.02037
[5,10[	7.5	17	0.157407	0.666667	0.031481
[10,15[	12.5	21	0.194444	0.861111	0.038889
[15,20[	17.5	8	0.074074	0.935185	0.014815
[20,25[	22.5	2	0.018519	0.953704	0.003704
[25,30[	27.5	3	0.027778	0.981481	0.005556
[30,35]	32.5	2	0.018519	1	0.003704