Question: his data set contains longitudinal information from 24 students with the following variables: SEX (1 = male, 2 = female) GPA15 (GPA when the student

his data set contains longitudinal information from 24 students with the following variables: SEX (1 = male, 2 = female) GPA15 (GPA when the student is 15) GPA17 (GPA when the student is 17) We are interested in whether boys have lower GPAs than girls. In order to examine this question, we obtain the GPAs for 12 girls and 12 boys. At age 15, do boys have significantly lower GPAs than girls? What is the independent variable? Group of answer choices

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