teststatistikat
Teststatistikat, often translated as "test statistics," are values calculated from sample data during hypothesis testing. Their primary purpose is to summarize the information in the sample in a way that allows us to decide whether to reject or fail to reject a null hypothesis. Each type of hypothesis test, such as a t-test, z-test, chi-squared test, or F-test, uses a specific test statistic.
The calculation of a test statistic typically involves the difference between an observed sample value and
Once calculated, the test statistic is compared to a critical value from a probability distribution (e.g., the