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.

Beware a study that collects data on a zillion different variables, and then looks for evidence of relationships via hypothesis testing. (This is sometimes refered to as “shotgun statistics.”) A ...

Learn how two-tailed tests determine statistical significance in hypothesis testing by evaluating if a sample differs from a population mean. Discover real-world applications.

We illustrate our testing procedures using two real data examples and provide recommendations for plant-disease researchers in the field. Published quarterly since 1996, the Journal of Agricultural, ...

The matrix-variate normal distribution is a popular model for high-dimensional transposable data because it decomposes the dependence structure of the random matrix into the Kronecker product of two ...

We address this shortcoming by constructing hypothesis test statistics for CoVaR and MES that can be used to detect systemic risk at the institution level. We apply our tests to daily stock ...