Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[12,13[	12.5	1	0.016393	0.016393	0.016393
[13,14[	13.5	5	0.081967	0.098361	0.081967
[14,15[	14.5	6	0.098361	0.196721	0.098361
[15,16[	15.5	8	0.131148	0.327869	0.131148
[16,17[	16.5	12	0.196721	0.52459	0.196721
[17,18[	17.5	8	0.131148	0.655738	0.131148
[18,19[	18.5	11	0.180328	0.836066	0.180328
[19,20[	19.5	6	0.098361	0.934426	0.098361
[20,21]	20.5	4	0.065574	1	0.065574