The 2008 GSS asked, “What is the highest grade that you finished and got credit for?” (variable EDUC). Of 2018 respondents, the mean was 13.4, the standard deviation was 3.1, and the proportion who gave responses below 12 (i.e., less than a high school education) was 0.166. Explain how you could analyze these data by making inferences about a population mean or about a population proportion, or both. Show how to implement one of these types of inference with these data.