Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[13,14[	13.5	1	0.043478	0.043478	0.043478
[14,15[	14.5	1	0.043478	0.086957	0.043478
[15,16[	15.5	7	0.304348	0.391304	0.304348
[16,17[	16.5	6	0.26087	0.652174	0.26087
[17,18[	17.5	6	0.26087	0.913043	0.26087
[18,19]	18.5	2	0.086957	1	0.086957