noun
( statistics ) a situation in which a set of results or figures does not show a true situation, because the group of people or things it was based on was not typical of a wider group
noun
( statistics ) a situation in which a set of results or figures does not show a true situation, because the group of people or things it was based on was not typical of a wider group
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005