Quiz

 1008 randomly selected college freshmen were asked if their parents were paying for their college tuition.  687 of them answered yes that their parents were paying. 

1. Find a point estimate for the proportion of college freshmen whose parents are paying.
    
2. Determine the appropriate 99% confidence interval and interpret in a complete sentence what this confidence interval represents.
    
3. Is the normal approximation of the binomial justified here?  Explain.