Professor Palmer is interested in gender, mood, and alcohol consumption. She tests people of different genders in positive and negative moods and asks them to report the number of alcoholic drinks they have consumed in the last 2 hours. What is one of the independent variables and its associated levels?
Mood is an independent variable, and the levels are gender and alcohol consumption.
Alcohol consumption is an independent variable, and the levels are number of drinks and mood.
Mood is an independent variable, and the levels are positive and negative.
Positive mood is an independent variable, and the levels are people of different genders.