NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of ...

Statistical significance is a critical concept in data analysis and research. In essence, it’s a measure that allows researchers to assess whether the results of an experiment or study are due to ...

Goodness-of-fit testing is a foundational component of statistical inference, providing a formal mechanism to evaluate whether observed data conform to a specified theoretical distribution.

A study has validated a new statistical model that uses multiple standardized test scores over time to predict future academic performance. The dynamic measurement model accurately predicted academic ...

Learn about goodness-of-fit tests, including the chi-square test, to evaluate how well your sample data matches the expected ...

An American statistician says strong statistical evidence backs up the claims of Iranian protestors that Mahmoud Ahmadinejad’s victory in the June election was fraudulent. Walter Mebane of the ...