Let's Say We Wanted to See If There Was a Significant

Multiple Choice

Let's say we wanted to see if there was a significant difference between your class's GPA when you were all freshmen and your class's GPA today. What is the proper test for differences?

A) differences between percentages of 2 groups
B) differences between percentages of 2 variables in one group
C) differences between 2 research projects
D) differences between averages of 2 variables in one group
E) differences between averages of 2 groups