Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[15,16[	15.5	20	0.238095	0.238095	0.238095
[16,17[	16.5	17	0.202381	0.440476	0.202381
[17,18[	17.5	24	0.285714	0.72619	0.285714
[18,19]	18.5	23	0.27381	1	0.27381