Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[13,14[	13.5	4	0.023952	0.023952	0.023952
[14,15[	14.5	9	0.053892	0.077844	0.053892
[15,16[	15.5	11	0.065868	0.143713	0.065868
[16,17[	16.5	34	0.203593	0.347305	0.203593
[17,18[	17.5	30	0.179641	0.526946	0.179641
[18,19[	18.5	31	0.185629	0.712575	0.185629
[19,20]	19.5	48	0.287425	1	0.287425