🔒 Preview mode. The first 15 Foundations lessons are free; this one is Pro. Start a 7-day trial to unlock the editor, AI hints and the rest of the curriculum. Card required, cancel any time in Dashboard.Start 7-day trial →
← Courses›Data Science Applied›Module 4 · Causal Inference & A/B Testing›Time-series lag features via shift()quiz53 / 104
+100 XP
Task
📝 **Question:** In a panel of 100 stores, what's the right way to compute a 7-day lag of sales?
📋 Pick the right answer.
💡 **Hint:** Re-read the theory above if unsure.
🎯 Quiz
Question
📝 **Question:** In a panel of 100 stores, what's the right way to compute a 7-day lag of sales?
📋 Pick the right answer.
💡 **Hint:** Re-read the theory above if unsure.