The document outlines the steps to design a controlled experiment, starting with formulating a question based on observation. It emphasizes making observations, refining hypotheses, selecting specific variables to test, choosing a control group, and conducting tests. The process is iterative, encouraging continued testing for reliable results.

1. how to design a
controlled experiment

9. Here are the steps to take when performing an
experiment with a control group:
• 1.Ask a question based on observation. Your experiment
should begin with a question that needs an answer. ...
• Make observations. ...
• Refine your hypothesis. ...
• Select a specific variable to test. ...
• Pick a control group. ...
• Conduct your tests. ...
• Continue your tests.