nulhypotese
The null hypothesis, or nulhypotese in several languages, is a default statement in statistical hypothesis testing about a population parameter. It typically asserts that there is no effect, no difference, or no association. Common forms include H0: μ = μ0 or H0: p = p0. The alternative hypothesis, Ha or H1, expresses what the researcher seeks to demonstrate, such as μ ≠ μ0, μ > μ0, or p ≠ p0. The null hypothesis serves as the baseline against which evidence from data is evaluated.
In a formal test, researchers select a significance level, usually denoted alpha (often 0.05). A test statistic
Interpreting results requires context. A small p-value indicates data are inconsistent with H0 under the assumed