Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Publicly held companies, or private companies that apply for credit, must have routine audits of financial transactions conducted. Outside agencies, not affiliated with the company, perform these ...

Non-parametric tests are used when standard assumptions are not available. These tests don’t rely on distributions, often ...