ge-educated parents. The National of Educational Progress (NAEP) includes a "long- term trend" study that tracks reading and mathemat- ics skills over time and obtains demographic informa- tion. In the 2012 study, a random sample of 9000 17-year-old students was selected.26 The NAEP sample used a multistage design, but the overall effect is quite similar to an SRS of 17-year-olds who are still in school. (a) In the sample, 51% of students had at least one parent who was a college graduate. Estimate, with 99% confidence, the proportion of all 17-year-old students in 2012 who had at least one parent gradu- ate from college. (b) The sample does not include 17-year-olds who dropped out of school, so your estimate is only valid for stu- dents. Do you think the proportion of all 17-year-olds with at least one parent who was a college graduate 51962 F