- A new drug is proposed for treatment of a disease. The Null Hypothesis is that the drug has no effect.
- Reports have come in that a UFO has been spotted by Roswell, New Mexico. The Null Hypothesis is that the unidentified object is nothing significant (it is not an alien ship).
The Null Hypothesis is the reason I can say things like homeopathy has no effect, essential oils have no medicinal value, and Roswell aliens don't exist. Without the Null Hypothesis a test that gives negative results gives no information and could be considered "failed". With the Null Hypothesis, even negative results are meaningful.
So next time you have a question - define a Null Hypothesis and put it to the test!
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