Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-40,-30[	-35	1	0.014706	0.014706	0.001471
[-30,-20[	-25	6	0.088235	0.102941	0.008824
[-20,-10[	-15	11	0.161765	0.264706	0.016176
[-10,0[	-5	15	0.220588	0.485294	0.022059
[0,10[	5	20	0.294118	0.779412	0.029412
[10,20[	15	7	0.102941	0.882353	0.010294
[20,30[	25	6	0.088235	0.970588	0.008824
[30,40[	35	0	0	0.970588	0
[40,50[	45	0	0	0.970588	0
[50,60]	55	2	0.029412	1	0.002941