Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[10,11[	10.5	1	0.010101	0.010101	0.010101
[11,12[	11.5	3	0.030303	0.040404	0.030303
[12,13[	12.5	3	0.030303	0.070707	0.030303
[13,14[	13.5	8	0.080808	0.151515	0.080808
[14,15[	14.5	13	0.131313	0.282828	0.131313
[15,16[	15.5	16	0.161616	0.444444	0.161616
[16,17[	16.5	27	0.272727	0.717172	0.272727
[17,18[	17.5	19	0.191919	0.909091	0.191919
[18,19[	18.5	6	0.060606	0.969697	0.060606
[19,20]	19.5	3	0.030303	1	0.030303