In Hypothesis Testing 1, 2 and 3, you have used normal and t-distributions to test hypotheses. Chi-Square tests use the Chi-Square probability distribution. You will be introduced to the use of that ...

Today our goal is to cover hypothesis testing and the basic z-test, as these are fundamental to understanding how the t-test works. We’ll return to the t-test soon — with real data.

Thus, hypothesis testing serves to explore the relationship between two or more variables in an experimental setting. Business managers may then use the results of a hypothesis test when making ...

Last, use a replication method to approximate the distribution of this estimated quadratic form to perform the hypothesis test. Specific applications of this general approach have been used previously ...

In this survey we review some recently developed methods for testing hypotheses about high-dimensional multinomials. Traditional tests like the χ²-test and the likelihood ratio test can have poor ...

Without considering pre-test probability, however, some of this testing may be unnecessary, and the results may not lead to an accurate diagnosis.