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The Admissions Officer from a large university mailed a survey to 600 students selected at random.The sample was designed to include 150 students randomly selected from each of the freshman,sophomore,junior,and senior classes on campus.What sampling method was used?
Boundary Conditions
Constraints or limits that define the state or parameters for a particular system or problem.
Climate Computer Model
A computational program that simulates the Earth's climate systems to predict future climate changes based on various scenarios of greenhouse gas emissions.
Greenhouse Gases
Gases in Earth's atmosphere that trap heat, contributing to the greenhouse effect, including carbon dioxide and methane.
Chlorofluorocarbons
Man-made chemical compounds once used in aerosol sprays and refrigerants, known for their damaging effects on the Earth's ozone layer.
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