AI engineering glossary · Statistics inference
What is null hypothesis?
Null hypothesis: The default claim in a test, usually that there is no effect or no difference. The test asks whether the data are surprising enough to cast serious doubt on it; failing to do so does not prove it true.
Null hypothesis: an example
For a new checkout page, the null hypothesis is that its conversion rate equals the old page's rate.
Related terms
More Statistics inference terms
- One-tailed and two-tailed tests
- P-hacking
- P-value
- Paired t-test
- Peeking problem
- Permutation test
- Point estimate
- Population parameter
Where you learn it
Null hypothesis is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.