Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[13,14[	13.5	3	0.035714	0.035714	0.035714
[14,15[	14.5	0	0	0.035714	0
[15,16[	15.5	3	0.035714	0.071429	0.035714
[16,17[	16.5	9	0.107143	0.178571	0.107143
[17,18[	17.5	0	0	0.178571	0
[18,19[	18.5	9	0.107143	0.285714	0.107143
[19,20[	19.5	15	0.178571	0.464286	0.178571
[20,21[	20.5	12	0.142857	0.607143	0.142857
[21,22[	21.5	3	0.035714	0.642857	0.035714
[22,23[	22.5	9	0.107143	0.75	0.107143
[23,24[	23.5	9	0.107143	0.857143	0.107143
[24,25[	24.5	6	0.071429	0.928571	0.071429
[25,26[	25.5	3	0.035714	0.964286	0.035714
[26,27[	26.5	0	0	0.964286	0
[27,28[	27.5	0	0	0.964286	0
[28,29]	28.5	3	0.035714	1	0.035714