A recent survey of college freshmen investigated the amount of involvement their parents have with decisions concerning their education. When asked about the decision to go to college, 84% said their parents' involvement was about right, 10.3% said it was too much, and 5.7% said it was too little. When it came to selecting individual courses, 72.5% said their parents' involvement was about right, 3.5% said it was too much, and 24.0% said it was too little (M. B. Marklein, "Study: Colleges Shouldn't Fret Over Hands-on Parents," www.usatoday.com, January 23, 2008). What additional information would you want to know about the survey before you accepted the results of the study?