While doing your monthly reporting you notice a decline in the open rate of your blog subscriber emails. You decide to run an experiment, but before you can run the test you need to formulate a hypothesis. All of these factors should be considered when creating your hypothesis EXCEPT:
If you will be able to test the hypothesis for a long enough period of time
If you will be able to prevent database decay
If you will have an opportunity to repeat the test
If there will be enough people to engage with the experiment
https://www.youtube.com/watch?v=U0fVoUIGI10