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 ...

In statistics, p̂ represents the sample proportion or the estimated proportion of a population that possesses a certain characteristic or attribute. It's a point estimate derived from sample data used ...

There is no disputing the importance of statistical analysis in biological research, but too often it is considered only after an experiment is completed, when it may be too late. This collection ...