A researcher studying the effects of environment on mood asks 100 college-age students to sit alone in a waiting room for 15 minutes at the beginning of an experiment. Half of the individuals are assigned to a room with dark blue walls, and the other half are assigned to a room with bright yellow walls. After 15 minutes in the waiting room, each person is brought into the lab and asked to rate their mood on a scale of 1-7. 1. What are the dependent and independent variables and their levels of measurement

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