Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-25,-20[	-22.5	5	0.045872	0.045872	0.009174
[-20,-15[	-17.5	7	0.06422	0.110092	0.012844
[-15,-10[	-12.5	15	0.137615	0.247706	0.027523
[-10,-5[	-7.5	22	0.201835	0.449541	0.040367
[-5,0[	-2.5	36	0.330275	0.779817	0.066055
[0,5[	2.5	17	0.155963	0.93578	0.031193
[5,10[	7.5	2	0.018349	0.954128	0.00367
[10,15]	12.5	5	0.045872	1	0.009174