Now it’s time to organize everything you know into a statement about your problem or question, and write a procedure that explains every step you’ll take in carrying out your experiment.
There are five steps to designing your experiment:
5A. Define the problem
5B. Select your variables
5C. Draft your hypothesis
5D. Write your procedure
5E. Get permissions
Step 4: Formulate a hypothesis 
Step 5A: Define the problem 