Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[15,16[	15.5	14	0.106061	0.106061	0.106061
[16,17[	16.5	30	0.227273	0.333333	0.227273
[17,18[	17.5	17	0.128788	0.462121	0.128788
[18,19[	18.5	25	0.189394	0.651515	0.189394
[19,20[	19.5	16	0.121212	0.772727	0.121212
[20,21[	20.5	9	0.068182	0.840909	0.068182
[21,22[	21.5	11	0.083333	0.924242	0.083333
[22,23]	22.5	10	0.075758	1	0.075758