Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[12,13[	12.5	2	0.027397	0.027397	0.027397
[13,14[	13.5	3	0.041096	0.068493	0.041096
[14,15[	14.5	8	0.109589	0.178082	0.109589
[15,16[	15.5	13	0.178082	0.356164	0.178082
[16,17[	16.5	14	0.191781	0.547945	0.191781
[17,18[	17.5	9	0.123288	0.671233	0.123288
[18,19[	18.5	10	0.136986	0.808219	0.136986
[19,20[	19.5	9	0.123288	0.931507	0.123288
[20,21]	20.5	5	0.068493	1	0.068493