Грешка мерења — разлика између измена

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* {{cite journal|jstor=1267450|title=Errors of Measurement in Statistics |author=W. G. Cochran|journal=Technometrics|volume=10|date=November 1968|pages=637–666|publisher=Taylor & Francis, Ltd. on behalf of American Statistical Association and American Society for Quality|doi=10.2307/1267450}}