What is hypothesis test？

A hypothesis test is a statistical method used to determine whether a hypothesis about a population parameter is supported by the sample data. It involves setting up two hypotheses: the null hypothesis, which assumes that there is no significant difference between the sample and population, and the alternative hypothesis, which assumes that there is a significant difference. The test then uses statistical techniques to determine the likelihood of observing the sample data if the null hypothesis were true. If the likelihood is very low, the null hypothesis is rejected in favor of the alternative hypothesis.