A statistical investigation

Target: Summarize a data set with the mean and keep the claim tied to it.

Language target: Separate a summary from a cause.

Likely miss: Students jump to a cause after one summary.

Ask: What did we measure, and what did we not measure?

If you see it: A statistical investigation moves from question, to data, to summary, to a claim that matches the variability.

Evidence to listen for: The student can say what the data do not show.

Next: If a cause is stated, ask which part of the data supports it.

Observable student moves: names both quantities, uses the represented relationship, and revises after feedback. This companion is not a score.