The z test is a common statistical test used to compare two groups with respect to their mean (average) values, or to compare one group with a hypothesized value, when the variable of interest is ...

The Brookbush Institute continues to enhance education with new courses, a modern glossary, an AI Tutor, and a client program ge ...

In very large samples, p-values go quickly to zero, and solely relying on p-values can lead the researcher to claim support for results of no practical significance. In a survey of large sample IS ...

I would like to respond to a recent letter by Mr. Robert Lem regarding Superintendent Critchfield’s characterization of Idaho’s 2025 ISAT results. Mr. Lem writes: ...