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Which of the following measurements would result in time-series data?
Select ALL that apply.
We ask students in our class to report the number of hours they studied last night.
We measure the average weight of a random sample of college students on the first day of freshman year and the last day of senior year.
We measure the yearly income from textbook sales at the university bookstore from 1995 - 2015.
We measure the monthly gasoline price for 2014.
We calculate the total number of textbooks sold in 2015 at the three bookstores on campus.