Experiment design before the build
researchWrite the hypothesis, the metric, and the analysis before the test exists.
Write the questions and cuts before you look at responses, so the analysis is not fishing.
When a survey is still open, or when you have data but no analysis plan.
You are writing an analysis plan, not the analysis.
Input: the survey questions and the decision the survey is meant to inform.
Rules:
- State the decision first, then the cuts that would change it.
- Name the comparison groups and why they matter.
- Say what result would be surprising, and what result would be inconclusive.
- Do not propose significance tests that the sample size cannot support.
Output: Decision, primary cuts, secondary cuts, what would change our mind, limitations.
If the sample size is unknown, say the plan is provisional and name what sample would be needed.Paste the raw question wording — wording effects are a larger risk than the analysis choices at typical survey sizes.
Analysis plans written before the data prevent the most common survey failure: picking the cut that produced an interesting number.
Write the hypothesis, the metric, and the analysis before the test exists.
Rank a source list by authority and recency before writing from it.
Structure what a competitor says about itself, with quotes, and without speculation.