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Degrees of Freedom
Degrees of freedom is a core statistical concept that dictates the precise mathematical shape of a test statistic's distribution when the null hypothesis is true. By determining this exact structural shape, the degrees of freedom make it possible for researchers to accurately calculate the probability, or value, associated with any given test score.
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Research Methods in Psychology - 4th American Edition @ KPU
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During hypothesis testing, what is the term for the specialized numerical value computed from sample data that serves as an intermediate step to evaluate the probability of obtaining the observed results if the null hypothesis were true?