Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[12,14[	13	3	0.041667	0.041667	0.020833
[14,16[	15	3	0.041667	0.083333	0.020833
[16,18[	17	6	0.083333	0.166667	0.041667
[18,20[	19	18	0.25	0.416667	0.125
[20,22[	21	12	0.166667	0.583333	0.083333
[22,24[	23	18	0.25	0.833333	0.125
[24,26[	25	9	0.125	0.958333	0.0625
[26,28[	27	0	0	0.958333	0
[28,30]	29	3	0.041667	1	0.020833