In the chi square analysis of cross-tabulated variables, the problem of low cell counts is usually solved by combining categories, at the cost of a loss of information, or by using larger samples, at ...

The product moment correlation coefficient is often used even for ordinal data with only a few scale steps. This procedure may lead to biased results, where the bias depends on the number of scale ...

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 ...

Daniel Jassy, CFA, is an Investopedia Academy instructor and the founder of SPYderCRusher Research. He contributes to Excel and Algorithmic Trading. Robert Kelly is managing director of XTS Energy LLC ...

The simple interest formula is Interest = P * R * T. Many, or all, of the products featured on this page are from our advertising partners who compensate us when you take certain actions on our ...

The Federal Reserve's preferred inflation gauge showed that consumer prices remained elevated in September, ahead of the central bank's policy meeting next week. The Commerce Department on Friday ...