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	6	0.082192	0.109589	0.082192
[14,15[	14.5	9	0.123288	0.232877	0.123288
[15,16[	15.5	12	0.164384	0.39726	0.164384
[16,17[	16.5	15	0.205479	0.60274	0.205479
[17,18[	17.5	7	0.09589	0.69863	0.09589
[18,19[	18.5	9	0.123288	0.821918	0.123288
[19,20[	19.5	8	0.109589	0.931507	0.109589
[20,21]	20.5	5	0.068493	1	0.068493