Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[50,60[	55	5	0.041667	0.041667	0.004167
[60,70[	65	19	0.158333	0.2	0.015833
[70,80[	75	21	0.175	0.375	0.0175
[80,90[	85	12	0.1	0.475	0.01
[90,100[	95	8	0.066667	0.541667	0.006667
[100,110[	105	15	0.125	0.666667	0.0125
[110,120[	115	17	0.141667	0.808333	0.014167
[120,130[	125	14	0.116667	0.925	0.011667
[130,140[	135	8	0.066667	0.991667	0.006667
[140,150]	145	1	0.008333	1	0.000833