Iva is studying whether students gain weight during their first year of college. She collects weights from all the incoming freshmen in the fall, then collects weights from them again at the end of the spring term. Which is the term for the correlation she finds when she compares the fall and spring weights of the students?

Autocorrelation

Step-by-step explanation:

Autocorrelation seeks to measure the level of correlation between values of the same variables across different observations in the data.

Iva is autocorellating because she wants to measure if students add weight during their first year of college, so the variables she's measuring across broad is the weight which she took at fall then at spring in order to ascertain the difference in the weight in the first year. Measuring of the same variables at different times in order to ascertain changes in the variables measured is autocorrelation.