Dataset: motorcycleed.dat Source: A. Ochiai, Y. Naya, J. Soh, et al (2006). "Do Motorcyclists Have Erectile Dysfunction? A Preliminary Study," International Journal of Impotence Research, Vol. 18, pp. 396-399 Description: Results of surveys of motorcyclists and non-motorcyclists with respect to age and erectile dysfunction measured on IIEF5 scale. Variables/Columns Group 8 /* 1=Control, 2=Motorcycle */ Age Range 16 /* 1=20-29, 2=30-39, 3=40-49, 4=50-59 */ Severity of ED 24 /* 1=No ED, 2=Mild, 3=Mild-to-moderate, 4=Moderate, 5=Severe */ Frequency 30-32