Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[27.5,28[	27.75	1	0.011905	0.011905	0.02381
[28,28.5[	28.25	3	0.035714	0.047619	0.071429
[28.5,29[	28.75	10	0.119048	0.166667	0.238095
[29,29.5[	29.25	21	0.25	0.416667	0.5
[29.5,30[	29.75	11	0.130952	0.547619	0.261905
[30,30.5[	30.25	12	0.142857	0.690476	0.285714
[30.5,31[	30.75	11	0.130952	0.821429	0.261905
[31,31.5[	31.25	6	0.071429	0.892857	0.142857
[31.5,32[	31.75	3	0.035714	0.928571	0.071429
[32,32.5[	32.25	5	0.059524	0.988095	0.119048
[32.5,33]	32.75	1	0.011905	1	0.02381