If the P value is less than 5%, reject the null hypothesis; if the P value is .05 or more, don't reject the null hypothesis. Statistics textbooks -- and statisticians for that matter -- focus almost ...

At times we wish to examine statistical evidence, and determine whether it supports or contradicts a claim that has been made (or that we might wish to make) concerning the entire population. This is ...

The Brookbush Institute continues to enhance education with new courses, a modern glossary, an AI Tutor, and a client program generator. Too often, professionals incorrectly treat a failure to refute ...

Did you ever wonder why 19th century pirates are often represented wearing eye patches? I never did, because I assumed that it was for the obvious reason: they had lost an eye. Pirates, like many ...

The problem of testing a point null hypothesis (or a "small interval" null hypothesis) is considered. Of interest is the relationship between the P value (or observed significance level) and ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

An excellent post by my colleague John Nielsen-Gammon, the Texas State climatologist, can be found here. An excerpt: … consider a pot of water. Somebody you don’t know claims that they have invented a ...