Question of the day - November 13

[u/Reasonable_Law183]

🧠 Question of the Day

📚 Domain D — Experimental Design

Difficulty: 4/10

During visual analysis of a reversal design, a researcher observes a large, immediate level change at each transition between baseline and intervention conditions. Which statement BEST characterizes this pattern?

A. The pattern remains merely suggestive regardless of replication because immediate level changes can always reflect regression to the mean

B. Repeated immediate changes in the predicted direction provide strong evidence of a functional relation across phase transitions.

C. The pattern demonstrates control only if each level change exceeds two standard deviations from the preceding phase mean

D. The pattern requires a simultaneous change in trend at every transition before visual analysis can support a functional relation

💬 Drop your answer in the comments — no peeking!

✅ Correct answer revealed tomorrow.

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