estimate of measure of dispersion statistic estimate standard error of estimate adapted from wikipedia and from SAGE research method article http://methods.sagepub.com/reference/encyc-of-research-design/n435.xml standard error of the estimate https://fevir.net/resources/CodeSystem/27270#STATO:0000562 http://davidmlane.com/hyperstat/A121160.html The standard error is a measure of dispersion applied to estimates across hypothetical repeated random samples. It is a measure of how precise an estimate of a statistical parameter is. The standard error is the estimated standard deviation of an estimate. It measures the uncertainty associated with the estimate. Compared with the standard deviations of the underlying distribution, which are usually unknown, standard errors can be calculated from observed data. Harold Lehmann, Kenneth Wilkins, Brian S. Alper, Xing Song, Joanne Dehnbostel, Muhammad Afzal, Philippe Rocca-Serra ready for release