Question: 6. In a study in which students is level 1, and schools is level 2, a model with a random slope for one of the

6. In a study in which students is level 1, and schools is level 2, a model with a random slope for one of the independent variables has a lower AIC than a model with a fixed slope for that variable. Which of the following interpretations is correct? 1. The slope of the independent variable is expected to be different among schools. 2. The slope of the independent variable is fixed across all schools. 3. The AIC is unrelated to random slopes. 4. The random slope reduces model complexity

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