Christina Majaski writes and edits finance, credit cards, and travel content. She has 14+ years of experience with print and digital publications. Khadija Khartit is a strategy, investment, and ...

Hypothesis testing is a formal procedure for investigating our ideas about the world using statistics. It is most often used by researchers to test predictions, called hypotheses. The first step in ...

Hypothesis testing is a key concept in inferential ... and significantly less than the mean of a population is considered a two-tailed test. A one-tailed test checks whether a sample mean is higher or ...