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📝 **Question:** You're forecasting tomorrow's sales using the past 7 days' average. Which expression is leakage-free?
📋 Pick the right answer.
💡 **Hint:** Re-read the theory above if unsure.
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📝 **Question:** You're forecasting tomorrow's sales using the past 7 days' average. Which expression is leakage-free?
📋 Pick the right answer.
💡 **Hint:** Re-read the theory above if unsure.