Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[-5,0[	-2.5	7	0.094595	0.094595	0.018919
[0,5[	2.5	8	0.108108	0.202703	0.021622
[5,10[	7.5	19	0.256757	0.459459	0.051351
[10,15[	12.5	30	0.405405	0.864865	0.081081
[15,20]	17.5	10	0.135135	1	0.027027