Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[55,60[	57.5	20	0.238095	0.238095	0.047619
[60,65[	62.5	28	0.333333	0.571429	0.066667
[65,70[	67.5	20	0.238095	0.809524	0.047619
[70,75[	72.5	13	0.154762	0.964286	0.030952
[75,80]	77.5	3	0.035714	1	0.007143