What are some examples of null hypotheses in theoretical biology research.

The neutral theory holds that most variation at the molecular level does not affect fitness and, therefore, the evolutionary fate of genetic variation is best ... Jun 16, 2022 ... A null hypothesis is an assumption or proposition where an observed difference between two samples of a statistical population is purely accidental. Dec 19, 2012 ... If the null hypothesis is supported, nothing unusual is going on; the factor under investigation has no explanatory power; the drug being tested ... KEY WORDS: Empirical Bayes; Empirical null hypothesis; Local false discovery rate; Microarray analysis; Unobserved covariates. 1. INTRODUCTION. Until ... Nov 6, 2019 ... In A/B testing, the null hypothesis typically states that both test variants perform equally—for example, that changing a landing page design ... Jul 17, 2019 ... Key Takeaways · A null hypothesis states there is no effect or relationship between two things being studied. · Testing a null hypothesis can ... Null and research hypothesis · Probability value and types of errors · Effect size and statistical significance · Directional and non-directional hypotheses ... The null is not rejected unless the hypothesis test shows otherwise. The null statement must always contain some form of equality (=, ≤ or ≥) Always write the ... Apr 9, 2025 ... A null hypothesis, which states that there is no effective difference between the observed sample mean and the hypothesized or stated population mean. Nov 27, 2022 ... Generally speaking, null hypotheses tend to assume there are no differences unless strong evidence suggests that there are differences.