The National Center for Education Statistics surveyed college graduates concerning numerous issues. For the situation below, choose the most appropriate statistical technique.

A sample of students had their GPAs recorded at the end of their freshmen year and again at the end of their junior year of college to see if there is a significant decrease in GPA as students in the population take more challenging classes in their majors.

Group of answer choices

a. 2-sample comparison of means

b. 1-sample mean analysis

c. Analysis of Variance (ANOVA)

d. Paired data t-test