Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[55,60[	57.5	8	0.111111	0.111111	0.022222
[60,65[	62.5	28	0.388889	0.5	0.077778
[65,70[	67.5	20	0.277778	0.777778	0.055556
[70,75[	72.5	13	0.180556	0.958333	0.036111
[75,80]	77.5	3	0.041667	1	0.008333