The two hypotheses in a test are the alternative hypothesis and the:

1. The pair of hypotheses have fixed names in statistical practice. 2. They are called the null hypothesis and the alternative hypothesis. 3. The null is the claim of no effect or no difference that the test tries to overturn. 4. The alternative is what the researcher suspects may be true instead. _Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 9 'Hypothesis Testing with One Sample', sections 9.1-9.6_