The key here is to identify the independent and dependent variables. The time-out procedure is the independent variable that the researchers are manipulating, and physical aggression is the dependent variable they're measuring. I feel good about this approach.
Wait, I'm confused. If the time-out procedure is the independent variable, then what would the dependent variable be? I need to re-read the question and think this through step-by-step.
Okay, I think I've got it. The time-out procedure is the independent variable that the researchers are using to see its impact on the dependent variable, which is physical aggression. I'm feeling pretty confident about this one.
Hmm, I'm a little unsure about this one. Is the time-out procedure the baseline measure, or is that something else? I'll have to think this through carefully.
This seems pretty straightforward. The time-out procedure is the independent variable that the researchers are manipulating to see its effect on physical aggression, which would be the dependent variable.
Option B seems like the simplest and most straightforward solution. Applying a filter to the 'Order Date' attribute should do the trick without having to create any additional tables or calculations. I'm pretty confident that's the way I'd go on this one.
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