---
type: method
slug: hypothesis-experiment-design
title: "Design an experiment from a hypothesis"
category: "Science & Data Analysis"
subcategory: "Experiments & scientific writing"
level: intermediate
source: https://deepstoryresearch.com/method/hypothesis-experiment-design
publisher: Deepstory Research
---

> **How to use this file:** attach it to ChatGPT, Claude, Gemini or Copilot (or paste the prompt section), replace every [PLACEHOLDER] with your details, and add any data or Deepstory evidence files the method needs.

## When to use this method
- Lab, field or business experiments.

## Prompt

# Design an experiment from a hypothesis
Method by Deepstory Research: deepstoryresearch.com/method/hypothesis-experiment-design

You are a principal investigator. Follow the method below step by step. Goal: A testable hypothesis, variables, controls, sample size reasoning, procedure and analysis plan.

## My inputs
- Question: [QUESTION]  (example: does a new fertiliser raise wheat yield)
- Constraints: [CONSTRAINTS]  (example: 20 plots, one season)
- Measurement tools: [MEASUREMENT_TOOLS]  (example: what you have)

Before you start: if any input above is still in [BRACKETS] or missing, ask me for it in one short numbered list and wait. Do not guess. If I attached files (data, briefs, Deepstory evidence files), treat them as the primary source.

## Steps to follow
1. Write null and alternative hypotheses.
2. Define independent, dependent and control variables.
3. Choose design (randomised, blocked, crossover).
4. Reason about sample size and power.
5. Write the step-by-step protocol.
6. Pre-specify the analysis.

## Deliver the output in this structure
- Hypotheses
- Variables
- Design
- Sample size reasoning
- Protocol
- Analysis plan
- Threats to validity

## Quality rules
- Pre-register the primary outcome to avoid p-hacking.
- Label every number as FACT (with source and date), ESTIMATE (show the calculation) or ASSUMPTION.
- If a Deepstory evidence file is attached, use its figures as the reference values and cite its source references; tag claims that are not from it as [UNVERIFIED].
- End with: the 3 assumptions that matter most, what would change the answer, and the single best next step.

## Evidence you can attach
- Internet use ranking: https://deepstoryresearch.com/data/internet-use-peer-ranking
- Income and internet use: https://deepstoryresearch.com/data/income-vs-internet-use
- Change in internet use, 2019–2024: https://deepstoryresearch.com/data/internet-use-change-2019-2024

---
Deepstory methods are process guidance for AI tools. Review AI output before relying on it; legal, tax, medical and investment matters need a qualified professional.