При проведении корреляционно-регрессионного анализа должны соблюдаться определенные требования:

  • 1) необходимо обеспечить качественную однородность изучаемой совокупности. Например, при изучении зависимостей между технико-экономическими показателями необходимо отбирать не только предприятия одной отрасли, но также предприятия, выпускающие однородную и однотипную продукцию, имеющие одинаковый характер техпроцессов и тип использующего оборудования;
  • 2) однородность изучаемой совокупности следует дополнить количественными характеристиками совокупности (с применением показателей вариации, проверки гипотезы о принадлежности «выделяющихся» или аномальных значений признака исследуемой совокупности);
  • 3) учет требований закона больших чисел: исходные данные должны быть массивными, представительными;
  • 4) включаемые в исследование признаки-факторы должны быть основными (оказывать, решающее влияние на уровень результативного признака) и быть независимыми друг от друга (не должны дублировать друг друга);
  • 5) при практическом применении результатов изучения корреляционной связи следует иметь в виду, что все основные положения теории корреляции и регрессии разрабатывались из предложения о нормальном характере распределения рассматриваемых признаков.

Поэтому целесообразно проверить правомерность такого подхода (изучить формы распределения признаков).
Изложенное указывает на то, что корреляционно-регрессионный анализ применяется преимущественно только к признакам, которые имеют количественное выражение.


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