Question: College Athletics: Graduation Rate

Women athletes at the University of Colorado, Boulder, have a long term graduation rate of 67% (Source: The Chronicle of Higher Education). Over the past several years, a random sample of 38 women athletes at the school showed that 21 eventually graduated. Does this indicate that the population proportion of women athletes who graduate from the University of Colorado, Boulder, is now less than 67%? Use a 5% level of significance.